diff --git a/src/Directory.Packages.props b/src/Directory.Packages.props
index 751e37799..31089d902 100644
--- a/src/Directory.Packages.props
+++ b/src/Directory.Packages.props
@@ -27,7 +27,7 @@
     <PackageVersion Include="Roslynator.Analyzers" Version="4.12.11" />
     <PackageVersion Include="Splat" Version="$(SplatVersion)" />
     <PackageVersion Include="Splat.Autofac" Version="$(SplatVersion)" />
-    <PackageVersion Include="Splat.Drawing" Version="15.2.22" />
+    <PackageVersion Include="Splat.Drawing" Version="$(SplatVersion)" />
     <PackageVersion Include="Splat.DryIoc" Version="$(SplatVersion)" />
     <PackageVersion Include="Splat.Ninject" Version="$(SplatVersion)" />
     <PackageVersion Include="stylecop.analyzers" Version="1.2.0-beta.556" />
diff --git a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.DotNet8_0.verified.txt b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.DotNet8_0.verified.txt
index 2a283a3d7..197cb35c6 100644
--- a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.DotNet8_0.verified.txt
+++ b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.DotNet8_0.verified.txt
@@ -732,10 +732,10 @@ namespace ReactiveUI
     }
     public static class ReactiveNotifyPropertyChangedMixin
     {
-        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> ObservableForProperty<TSender, TValue>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, bool beforeChange = false, bool skipInitial = true) { }
+        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> ObservableForProperty<TSender, TValue>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, bool beforeChange = false, bool skipInitial = true, bool isDistinct = true) { }
         public static System.IObservable<TRet> ObservableForProperty<TSender, TValue, TRet>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, System.Func<TValue?, TRet> selector, bool beforeChange = false)
             where TSender :  class { }
-        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> SubscribeToExpressionChain<TSender, TValue>(this TSender? source, System.Linq.Expressions.Expression? expression, bool beforeChange = false, bool skipInitial = true, bool suppressWarnings = false) { }
+        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> SubscribeToExpressionChain<TSender, TValue>(this TSender? source, System.Linq.Expressions.Expression? expression, bool beforeChange = false, bool skipInitial = true, bool suppressWarnings = false, bool isDistinct = true) { }
     }
     [System.Runtime.Serialization.DataContract]
     public class ReactiveObject : ReactiveUI.IHandleObservableErrors, ReactiveUI.IReactiveNotifyPropertyChanged<ReactiveUI.IReactiveObject>, ReactiveUI.IReactiveObject, Splat.IEnableLogger, System.ComponentModel.INotifyPropertyChanged, System.ComponentModel.INotifyPropertyChanging
@@ -1023,49 +1023,49 @@ namespace ReactiveUI
     }
     public static class WhenAnyMixin
     {
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<ReactiveUI.IObservedChange<TSender, T1>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, ReactiveUI.IObservedChange<TSender, T12>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Linq.Expressions.Expression? property12, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, TRet>> property1) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<T1, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2>> WhenAnyValue<TSender, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<T1, T2, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3>> WhenAnyValue<TSender, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<T1, T2, T3, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4>> WhenAnyValue<TSender, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<T1, T2, T3, T4, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5>> WhenAnyValue<TSender, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<T1, T2, T3, T4, T5, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<T1, T2, T3, T4, T5, T6, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6, T7>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<T1, T2, T3, T4, T5, T6, T7, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, TRet> selector) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<ReactiveUI.IObservedChange<TSender, T1>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, ReactiveUI.IObservedChange<TSender, T12>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Linq.Expressions.Expression? property12, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, TRet>> property1, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<T1, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2>> WhenAnyValue<TSender, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<T1, T2, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3>> WhenAnyValue<TSender, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<T1, T2, T3, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4>> WhenAnyValue<TSender, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<T1, T2, T3, T4, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5>> WhenAnyValue<TSender, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<T1, T2, T3, T4, T5, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<T1, T2, T3, T4, T5, T6, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6, T7>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<T1, T2, T3, T4, T5, T6, T7, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, TRet> selector, bool isDistinct = true) { }
     }
     public static class WhenAnyObservableMixin
     {
diff --git a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.DotNet9_0.verified.txt b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.DotNet9_0.verified.txt
index 9db5df94a..d316746f0 100644
--- a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.DotNet9_0.verified.txt
+++ b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.DotNet9_0.verified.txt
@@ -732,10 +732,10 @@ namespace ReactiveUI
     }
     public static class ReactiveNotifyPropertyChangedMixin
     {
-        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> ObservableForProperty<TSender, TValue>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, bool beforeChange = false, bool skipInitial = true) { }
+        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> ObservableForProperty<TSender, TValue>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, bool beforeChange = false, bool skipInitial = true, bool isDistinct = true) { }
         public static System.IObservable<TRet> ObservableForProperty<TSender, TValue, TRet>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, System.Func<TValue?, TRet> selector, bool beforeChange = false)
             where TSender :  class { }
-        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> SubscribeToExpressionChain<TSender, TValue>(this TSender? source, System.Linq.Expressions.Expression? expression, bool beforeChange = false, bool skipInitial = true, bool suppressWarnings = false) { }
+        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> SubscribeToExpressionChain<TSender, TValue>(this TSender? source, System.Linq.Expressions.Expression? expression, bool beforeChange = false, bool skipInitial = true, bool suppressWarnings = false, bool isDistinct = true) { }
     }
     [System.Runtime.Serialization.DataContract]
     public class ReactiveObject : ReactiveUI.IHandleObservableErrors, ReactiveUI.IReactiveNotifyPropertyChanged<ReactiveUI.IReactiveObject>, ReactiveUI.IReactiveObject, Splat.IEnableLogger, System.ComponentModel.INotifyPropertyChanged, System.ComponentModel.INotifyPropertyChanging
@@ -1023,49 +1023,49 @@ namespace ReactiveUI
     }
     public static class WhenAnyMixin
     {
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<ReactiveUI.IObservedChange<TSender, T1>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, ReactiveUI.IObservedChange<TSender, T12>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Linq.Expressions.Expression? property12, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, TRet>> property1) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<T1, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2>> WhenAnyValue<TSender, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<T1, T2, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3>> WhenAnyValue<TSender, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<T1, T2, T3, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4>> WhenAnyValue<TSender, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<T1, T2, T3, T4, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5>> WhenAnyValue<TSender, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<T1, T2, T3, T4, T5, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<T1, T2, T3, T4, T5, T6, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6, T7>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<T1, T2, T3, T4, T5, T6, T7, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, TRet> selector) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<ReactiveUI.IObservedChange<TSender, T1>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, ReactiveUI.IObservedChange<TSender, T12>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Linq.Expressions.Expression? property12, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, TRet>> property1, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<T1, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2>> WhenAnyValue<TSender, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<T1, T2, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3>> WhenAnyValue<TSender, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<T1, T2, T3, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4>> WhenAnyValue<TSender, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<T1, T2, T3, T4, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5>> WhenAnyValue<TSender, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<T1, T2, T3, T4, T5, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<T1, T2, T3, T4, T5, T6, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6, T7>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<T1, T2, T3, T4, T5, T6, T7, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, TRet> selector, bool isDistinct = true) { }
     }
     public static class WhenAnyObservableMixin
     {
diff --git a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.Net4_7.verified.txt b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.Net4_7.verified.txt
index 62d6010bc..e0a664fba 100644
--- a/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.Net4_7.verified.txt
+++ b/src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.Net4_7.verified.txt
@@ -710,10 +710,10 @@ namespace ReactiveUI
     }
     public static class ReactiveNotifyPropertyChangedMixin
     {
-        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> ObservableForProperty<TSender, TValue>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, bool beforeChange = false, bool skipInitial = true) { }
+        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> ObservableForProperty<TSender, TValue>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, bool beforeChange = false, bool skipInitial = true, bool isDistinct = true) { }
         public static System.IObservable<TRet> ObservableForProperty<TSender, TValue, TRet>(this TSender? item, System.Linq.Expressions.Expression<System.Func<TSender, TValue>> property, System.Func<TValue?, TRet> selector, bool beforeChange = false)
             where TSender :  class { }
-        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> SubscribeToExpressionChain<TSender, TValue>(this TSender? source, System.Linq.Expressions.Expression? expression, bool beforeChange = false, bool skipInitial = true, bool suppressWarnings = false) { }
+        public static System.IObservable<ReactiveUI.IObservedChange<TSender, TValue>> SubscribeToExpressionChain<TSender, TValue>(this TSender? source, System.Linq.Expressions.Expression? expression, bool beforeChange = false, bool skipInitial = true, bool suppressWarnings = false, bool isDistinct = true) { }
     }
     [System.Runtime.Serialization.DataContract]
     public class ReactiveObject : ReactiveUI.IHandleObservableErrors, ReactiveUI.IReactiveNotifyPropertyChanged<ReactiveUI.IReactiveObject>, ReactiveUI.IReactiveObject, Splat.IEnableLogger, System.ComponentModel.INotifyPropertyChanged, System.ComponentModel.INotifyPropertyChanging
@@ -1002,49 +1002,49 @@ namespace ReactiveUI
     }
     public static class WhenAnyMixin
     {
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<ReactiveUI.IObservedChange<TSender, T1>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, ReactiveUI.IObservedChange<TSender, T12>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Linq.Expressions.Expression? property12, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, TRet>> property1) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<T1, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2>> WhenAnyValue<TSender, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<T1, T2, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3>> WhenAnyValue<TSender, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<T1, T2, T3, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4>> WhenAnyValue<TSender, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<T1, T2, T3, T4, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5>> WhenAnyValue<TSender, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<T1, T2, T3, T4, T5, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<T1, T2, T3, T4, T5, T6, TRet> selector) { }
-        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6, T7>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<T1, T2, T3, T4, T5, T6, T7, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, TRet> selector) { }
-        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, TRet> selector) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<ReactiveUI.IObservedChange<TSender, T1>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAny<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<ReactiveUI.IObservedChange<TSender, T1>, ReactiveUI.IObservedChange<TSender, T2>, ReactiveUI.IObservedChange<TSender, T3>, ReactiveUI.IObservedChange<TSender, T4>, ReactiveUI.IObservedChange<TSender, T5>, ReactiveUI.IObservedChange<TSender, T6>, ReactiveUI.IObservedChange<TSender, T7>, ReactiveUI.IObservedChange<TSender, T8>, ReactiveUI.IObservedChange<TSender, T9>, ReactiveUI.IObservedChange<TSender, T10>, ReactiveUI.IObservedChange<TSender, T11>, ReactiveUI.IObservedChange<TSender, T12>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyDynamic<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression? property1, System.Linq.Expressions.Expression? property2, System.Linq.Expressions.Expression? property3, System.Linq.Expressions.Expression? property4, System.Linq.Expressions.Expression? property5, System.Linq.Expressions.Expression? property6, System.Linq.Expressions.Expression? property7, System.Linq.Expressions.Expression? property8, System.Linq.Expressions.Expression? property9, System.Linq.Expressions.Expression? property10, System.Linq.Expressions.Expression? property11, System.Linq.Expressions.Expression? property12, System.Func<ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, ReactiveUI.IObservedChange<TSender?, object?>, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, TRet>> property1, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Func<T1, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2>> WhenAnyValue<TSender, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Func<T1, T2, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3>> WhenAnyValue<TSender, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Func<T1, T2, T3, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4>> WhenAnyValue<TSender, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Func<T1, T2, T3, T4, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5>> WhenAnyValue<TSender, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Func<T1, T2, T3, T4, T5, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Func<T1, T2, T3, T4, T5, T6, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<System.ValueTuple<T1, T2, T3, T4, T5, T6, T7>> WhenAnyValue<TSender, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Func<T1, T2, T3, T4, T5, T6, T7, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, TRet> selector, bool isDistinct = true) { }
+        public static System.IObservable<TRet> WhenAnyValue<TSender, TRet, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12>(this TSender? sender, System.Linq.Expressions.Expression<System.Func<TSender, T1>> property1, System.Linq.Expressions.Expression<System.Func<TSender, T2>> property2, System.Linq.Expressions.Expression<System.Func<TSender, T3>> property3, System.Linq.Expressions.Expression<System.Func<TSender, T4>> property4, System.Linq.Expressions.Expression<System.Func<TSender, T5>> property5, System.Linq.Expressions.Expression<System.Func<TSender, T6>> property6, System.Linq.Expressions.Expression<System.Func<TSender, T7>> property7, System.Linq.Expressions.Expression<System.Func<TSender, T8>> property8, System.Linq.Expressions.Expression<System.Func<TSender, T9>> property9, System.Linq.Expressions.Expression<System.Func<TSender, T10>> property10, System.Linq.Expressions.Expression<System.Func<TSender, T11>> property11, System.Linq.Expressions.Expression<System.Func<TSender, T12>> property12, System.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, TRet> selector, bool isDistinct = true) { }
     }
     public static class WhenAnyObservableMixin
     {
diff --git a/src/ReactiveUI/Mixins/ReactiveNotifyPropertyChangedMixin.cs b/src/ReactiveUI/Mixins/ReactiveNotifyPropertyChangedMixin.cs
index d5c696eb3..60c084b64 100644
--- a/src/ReactiveUI/Mixins/ReactiveNotifyPropertyChangedMixin.cs
+++ b/src/ReactiveUI/Mixins/ReactiveNotifyPropertyChangedMixin.cs
@@ -34,18 +34,22 @@ public static class ReactiveNotifyPropertyChangedMixin
     /// <typeparam name="TValue">The value type.</typeparam>
     /// <param name="item">The source object to observe properties of.</param>
     /// <param name="property">An Expression representing the property (i.e.
-    /// 'x => x.SomeProperty.SomeOtherProperty'.</param>
+    /// 'x =&gt; x.SomeProperty.SomeOtherProperty'.</param>
     /// <param name="beforeChange">If True, the Observable will notify
     /// immediately before a property is going to change.</param>
     /// <param name="skipInitial">If true, the Observable will not notify
     /// with the initial value.</param>
-    /// <returns>An Observable representing the property change
-    /// notifications for the given property.</returns>
+    /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+    /// <returns>
+    /// An Observable representing the property change
+    /// notifications for the given property.
+    /// </returns>
     public static IObservable<IObservedChange<TSender, TValue>> ObservableForProperty<TSender, TValue>(
         this TSender? item,
         Expression<Func<TSender, TValue>> property,
         bool beforeChange = false,
-        bool skipInitial = true)
+        bool skipInitial = true,
+        bool isDistinct = true)
     {
         property.ArgumentNullExceptionThrowIfNull(nameof(property));
 
@@ -68,7 +72,8 @@ public static IObservable<IObservedChange<TSender, TValue>> ObservableForPropert
                                                            item,
                                                            property.Body,
                                                            beforeChange,
-                                                           skipInitial);
+                                                           skipInitial,
+                                                           isDistinct);
     }
 
     /// <summary>
@@ -104,24 +109,28 @@ public static IObservable<TRet> ObservableForProperty<TSender, TValue, TRet>(
 
     /// <summary>
     /// Creates a observable which will subscribe to the each property and sub property
-    /// specified in the Expression. eg It will subscribe to x => x.Property1.Property2.Property3
+    /// specified in the Expression. eg It will subscribe to x =&gt; x.Property1.Property2.Property3
     /// each property in the lambda expression. It will then provide updates to the last value in the chain.
     /// </summary>
+    /// <typeparam name="TSender">The type of the origin of the expression chain.</typeparam>
+    /// <typeparam name="TValue">The end value we want to subscribe to.</typeparam>
     /// <param name="source">The object where we start the chain.</param>
     /// <param name="expression">A expression which will point towards the property.</param>
     /// <param name="beforeChange">If we are interested in notifications before the property value is changed.</param>
     /// <param name="skipInitial">If we don't want to get a notification about the default value of the property.</param>
     /// <param name="suppressWarnings">If true, no warnings should be logged.</param>
-    /// <typeparam name="TSender">The type of the origin of the expression chain.</typeparam>
-    /// <typeparam name="TValue">The end value we want to subscribe to.</typeparam>
-    /// <returns>A observable which notifies about observed changes.</returns>
+    /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+    /// <returns>
+    /// A observable which notifies about observed changes.
+    /// </returns>
     /// <exception cref="InvalidCastException">If we cannot cast from the target value from the specified last property.</exception>
     public static IObservable<IObservedChange<TSender, TValue>> SubscribeToExpressionChain<TSender, TValue>(
         this TSender? source,
         Expression? expression,
         bool beforeChange = false,
         bool skipInitial = true,
-        bool suppressWarnings = false) // TODO: Create Test
+        bool suppressWarnings = false,
+        bool isDistinct = true) // TODO: Create Test
     {
         IObservable<IObservedChange<object?, object?>> notifier =
             Observable.Return(new ObservedChange<object?, object?>(null, null, source));
@@ -150,7 +159,12 @@ public static IObservable<IObservedChange<TSender, TValue>> SubscribeToExpressio
             return new ObservedChange<TSender, TValue>(source!, expression, (TValue)val!);
         });
 
-        return r.DistinctUntilChanged(x => x.Value);
+        if (isDistinct)
+        {
+            return r.DistinctUntilChanged(x => x.Value);
+        }
+
+        return r;
     }
 
     private static IObservable<IObservedChange<object?, object?>> NestedObservedChanges(Expression expression, IObservedChange<object?, object?> sourceChange, bool beforeChange, bool suppressWarnings)
diff --git a/src/ReactiveUI/ReactiveUI.csproj b/src/ReactiveUI/ReactiveUI.csproj
index 581126c91..16c989792 100644
--- a/src/ReactiveUI/ReactiveUI.csproj
+++ b/src/ReactiveUI/ReactiveUI.csproj
@@ -69,4 +69,7 @@
     <None Update="VariadicTemplates.tt" Generator="TextTemplatingFileGenerator" LastGenOutput="VariadicTemplates.cs" />
     <Compile Update="VariadicTemplates.cs" DesignTime="True" AutoGen="true" DependentUpon="VariadicTemplates.tt" />
   </ItemGroup>
+  <ItemGroup>
+    <Service Include="{508349b6-6b84-4df5-91f0-309beebad82d}" />
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/ReactiveUI/VariadicTemplates.cs b/src/ReactiveUI/VariadicTemplates.cs
index 54b5c4910..bf6aebf72 100644
--- a/src/ReactiveUI/VariadicTemplates.cs
+++ b/src/ReactiveUI/VariadicTemplates.cs
@@ -19,604 +19,627 @@
 using System.Linq.Expressions;
 
 
-namespace ReactiveUI;
-
-/// <summary>Extension methods associated with the WhenAny/WhenAnyValue classes.</summary>
-public static class WhenAnyMixin
+namespace ReactiveUI
 {
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of a
-    /// property on an object has changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The first property chain to reference. This will be a expression pointing to a end property or field.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet>(
-        this TSender? sender,
-        Expression<Func<TSender, TRet>> property1)
-    {
-        return sender!.WhenAny(property1, (IObservedChange<TSender, TRet> c1) => c1.Value);
-    }
-
-                                                                    
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Func<T1, TRet> selector)
-    {
-        return sender!.WhenAny(property1,
-                            (c1) =>
-                                selector(c1.Value));
-    }
+    /// <summary>Extension methods associated with the WhenAny/WhenAnyValue classes.</summary>
+    public static class WhenAnyMixin
+    {
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of a
+        /// property on an object has changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The first property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet>(
+            this TSender? sender,
+            Expression<Func<TSender, TRet>> property1,
+            bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, (IObservedChange<TSender, TRet> c1) => c1.Value, isDistinct);
+        }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1>(
+                                                                        
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
-                        Func<IObservedChange<TSender, T1>, TRet> selector)
-    {
-                        return sender!.ObservableForProperty(property1, false, false).Select(selector);
-                }
+                        Func<T1, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1,
+                                (c1) =>
+                                    selector(c1.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Func<IObservedChange<TSender, T1>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                            return sender!.ObservableForProperty(property1, false, false, isDistinct).Select(selector);
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Func<IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                        return ReactiveNotifyPropertyChangedMixin
-                .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false).Select(selector);
-                }
-                                                                
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    public static IObservable<(T1,T2)> WhenAnyValue<TSender, T1,T2>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2
-        )
-    {
-        return sender!.WhenAny(property1, property2,
-                            (c1, c2) =>
-                                (c1.Value, c2.Value));
-    }
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Func<T1,T2, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2,
-                            (c1, c2) =>
-                                selector(c1.Value, c2.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Func<IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                            return ReactiveNotifyPropertyChangedMixin
+                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct).Select(selector);
+                    }
+                                                                    
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        public static IObservable<(T1,T2)> WhenAnyValue<TSender, T1,T2>(
+            this TSender? sender,
+                        Expression<Func<TSender, T1>> property1,
+                        Expression<Func<TSender, T2>> property2
+            ,
+            bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2,
+                                (c1, c2) =>
+                                    (c1.Value, c2.Value),
+                                    isDistinct);
+        }
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2,
+                                (c1, c2) =>
+                                    selector(c1.Value, c2.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                            selector
-        );
-                }
-                                                                
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    public static IObservable<(T1,T2,T3)> WhenAnyValue<TSender, T1,T2,T3>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3
-        )
-    {
-        return sender!.WhenAny(property1, property2, property3,
-                            (c1, c2, c3) =>
-                                (c1.Value, c2.Value, c3.Value));
-    }
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Func<T1,T2,T3, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3,
-                            (c1, c2, c3) =>
-                                selector(c1.Value, c2.Value, c3.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        public static IObservable<(T1,T2,T3)> WhenAnyValue<TSender, T1,T2,T3>(
+            this TSender? sender,
+                        Expression<Func<TSender, T1>> property1,
+                        Expression<Func<TSender, T2>> property2,
+                        Expression<Func<TSender, T3>> property3
+            ,
+            bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3,
+                                (c1, c2, c3) =>
+                                    (c1.Value, c2.Value, c3.Value),
+                                    isDistinct);
+        }
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
                         Expression<Func<TSender, T3>> property3,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3,
+                                (c1, c2, c3) =>
+                                    selector(c1.Value, c2.Value, c3.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                            selector
-        );
-                }
-                                                                
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    public static IObservable<(T1,T2,T3,T4)> WhenAnyValue<TSender, T1,T2,T3,T4>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4
-        )
-    {
-        return sender!.WhenAny(property1, property2, property3, property4,
-                            (c1, c2, c3, c4) =>
-                                (c1.Value, c2.Value, c3.Value, c4.Value));
-    }
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Func<T1,T2,T3,T4, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4,
-                            (c1, c2, c3, c4) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        public static IObservable<(T1,T2,T3,T4)> WhenAnyValue<TSender, T1,T2,T3,T4>(
+            this TSender? sender,
+                        Expression<Func<TSender, T1>> property1,
+                        Expression<Func<TSender, T2>> property2,
+                        Expression<Func<TSender, T3>> property3,
+                        Expression<Func<TSender, T4>> property4
+            ,
+            bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4,
+                                (c1, c2, c3, c4) =>
+                                    (c1.Value, c2.Value, c3.Value, c4.Value),
+                                    isDistinct);
+        }
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
                         Expression<Func<TSender, T3>> property3,
                         Expression<Func<TSender, T4>> property4,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4,
+                                (c1, c2, c3, c4) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                            selector
-        );
-                }
-                                                                
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    public static IObservable<(T1,T2,T3,T4,T5)> WhenAnyValue<TSender, T1,T2,T3,T4,T5>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5
-        )
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5,
-                            (c1, c2, c3, c4, c5) =>
-                                (c1.Value, c2.Value, c3.Value, c4.Value, c5.Value));
-    }
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Func<T1,T2,T3,T4,T5, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5,
-                            (c1, c2, c3, c4, c5) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        public static IObservable<(T1,T2,T3,T4,T5)> WhenAnyValue<TSender, T1,T2,T3,T4,T5>(
+            this TSender? sender,
+                        Expression<Func<TSender, T1>> property1,
+                        Expression<Func<TSender, T2>> property2,
+                        Expression<Func<TSender, T3>> property3,
+                        Expression<Func<TSender, T4>> property4,
+                        Expression<Func<TSender, T5>> property5
+            ,
+            bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5,
+                                (c1, c2, c3, c4, c5) =>
+                                    (c1.Value, c2.Value, c3.Value, c4.Value, c5.Value),
+                                    isDistinct);
+        }
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
                         Expression<Func<TSender, T3>> property3,
                         Expression<Func<TSender, T4>> property4,
                         Expression<Func<TSender, T5>> property5,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                                sender!.ObservableForProperty(property5, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4,T5, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5,
+                                (c1, c2, c3, c4, c5) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Expression<Func<TSender, T5>> property5,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property5, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Expression? property5,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false),
-                            selector
-        );
-                }
-                                                                
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    public static IObservable<(T1,T2,T3,T4,T5,T6)> WhenAnyValue<TSender, T1,T2,T3,T4,T5,T6>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6
-        )
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6,
-                            (c1, c2, c3, c4, c5, c6) =>
-                                (c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value));
-    }
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6,
-                    Func<T1,T2,T3,T4,T5,T6, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6,
-                            (c1, c2, c3, c4, c5, c6) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Expression? property5,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        public static IObservable<(T1,T2,T3,T4,T5,T6)> WhenAnyValue<TSender, T1,T2,T3,T4,T5,T6>(
+            this TSender? sender,
+                        Expression<Func<TSender, T1>> property1,
+                        Expression<Func<TSender, T2>> property2,
+                        Expression<Func<TSender, T3>> property3,
+                        Expression<Func<TSender, T4>> property4,
+                        Expression<Func<TSender, T5>> property5,
+                        Expression<Func<TSender, T6>> property6
+            ,
+            bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6,
+                                (c1, c2, c3, c4, c5, c6) =>
+                                    (c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value),
+                                    isDistinct);
+        }
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
@@ -624,142 +647,150 @@ public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6>(
                         Expression<Func<TSender, T4>> property4,
                         Expression<Func<TSender, T5>> property5,
                         Expression<Func<TSender, T6>> property6,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                                sender!.ObservableForProperty(property5, false, false),
-                                sender!.ObservableForProperty(property6, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4,T5,T6, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6,
+                                (c1, c2, c3, c4, c5, c6) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Expression<Func<TSender, T5>> property5,
+                            Expression<Func<TSender, T6>> property6,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property5, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property6, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Expression? property5,
-                        Expression? property6,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false),
-                            selector
-        );
-                }
-                                                                
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    public static IObservable<(T1,T2,T3,T4,T5,T6,T7)> WhenAnyValue<TSender, T1,T2,T3,T4,T5,T6,T7>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6,
-                    Expression<Func<TSender, T7>> property7
-        )
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7,
-                            (c1, c2, c3, c4, c5, c6, c7) =>
-                                (c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value));
-    }
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6,
-                    Expression<Func<TSender, T7>> property7,
-                    Func<T1,T2,T3,T4,T5,T6,T7, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7,
-                            (c1, c2, c3, c4, c5, c6, c7) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Expression? property5,
+                            Expression? property6,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        public static IObservable<(T1,T2,T3,T4,T5,T6,T7)> WhenAnyValue<TSender, T1,T2,T3,T4,T5,T6,T7>(
+            this TSender? sender,
+                        Expression<Func<TSender, T1>> property1,
+                        Expression<Func<TSender, T2>> property2,
+                        Expression<Func<TSender, T3>> property3,
+                        Expression<Func<TSender, T4>> property4,
+                        Expression<Func<TSender, T5>> property5,
+                        Expression<Func<TSender, T6>> property6,
+                        Expression<Func<TSender, T7>> property7
+            ,
+            bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7,
+                                (c1, c2, c3, c4, c5, c6, c7) =>
+                                    (c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value),
+                                    isDistinct);
+        }
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
@@ -768,120 +799,125 @@ public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7>(
                         Expression<Func<TSender, T5>> property5,
                         Expression<Func<TSender, T6>> property6,
                         Expression<Func<TSender, T7>> property7,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                                sender!.ObservableForProperty(property5, false, false),
-                                sender!.ObservableForProperty(property6, false, false),
-                                sender!.ObservableForProperty(property7, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4,T5,T6,T7, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7,
+                                (c1, c2, c3, c4, c5, c6, c7) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Expression<Func<TSender, T5>> property5,
+                            Expression<Func<TSender, T6>> property6,
+                            Expression<Func<TSender, T7>> property7,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property5, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property6, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property7, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Expression? property5,
-                        Expression? property6,
-                        Expression? property7,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false),
-                            selector
-        );
-                }
-                                                                
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6,
-                    Expression<Func<TSender, T7>> property7,
-                    Expression<Func<TSender, T8>> property8,
-                    Func<T1,T2,T3,T4,T5,T6,T7,T8, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8,
-                            (c1, c2, c3, c4, c5, c6, c7, c8) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Expression? property5,
+                            Expression? property6,
+                            Expression? property7,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
@@ -891,128 +927,133 @@ public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8>(
                         Expression<Func<TSender, T6>> property6,
                         Expression<Func<TSender, T7>> property7,
                         Expression<Func<TSender, T8>> property8,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                                sender!.ObservableForProperty(property5, false, false),
-                                sender!.ObservableForProperty(property6, false, false),
-                                sender!.ObservableForProperty(property7, false, false),
-                                sender!.ObservableForProperty(property8, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4,T5,T6,T7,T8, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8,
+                                (c1, c2, c3, c4, c5, c6, c7, c8) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Expression<Func<TSender, T5>> property5,
+                            Expression<Func<TSender, T6>> property6,
+                            Expression<Func<TSender, T7>> property7,
+                            Expression<Func<TSender, T8>> property8,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property5, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property6, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property7, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property8, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Expression? property5,
-                        Expression? property6,
-                        Expression? property7,
-                        Expression? property8,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false),
-                            selector
-        );
-                }
-                                                                
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6,
-                    Expression<Func<TSender, T7>> property7,
-                    Expression<Func<TSender, T8>> property8,
-                    Expression<Func<TSender, T9>> property9,
-                    Func<T1,T2,T3,T4,T5,T6,T7,T8,T9, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8, property9,
-                            (c1, c2, c3, c4, c5, c6, c7, c8, c9) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value, c9.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Expression? property5,
+                            Expression? property6,
+                            Expression? property7,
+                            Expression? property8,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
@@ -1023,136 +1064,141 @@ public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T
                         Expression<Func<TSender, T7>> property7,
                         Expression<Func<TSender, T8>> property8,
                         Expression<Func<TSender, T9>> property9,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, IObservedChange<TSender, T9>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                                sender!.ObservableForProperty(property5, false, false),
-                                sender!.ObservableForProperty(property6, false, false),
-                                sender!.ObservableForProperty(property7, false, false),
-                                sender!.ObservableForProperty(property8, false, false),
-                                sender!.ObservableForProperty(property9, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4,T5,T6,T7,T8,T9, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8, property9,
+                                (c1, c2, c3, c4, c5, c6, c7, c8, c9) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value, c9.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Expression<Func<TSender, T5>> property5,
+                            Expression<Func<TSender, T6>> property6,
+                            Expression<Func<TSender, T7>> property7,
+                            Expression<Func<TSender, T8>> property8,
+                            Expression<Func<TSender, T9>> property9,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, IObservedChange<TSender, T9>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property5, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property6, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property7, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property8, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property9, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Expression? property5,
-                        Expression? property6,
-                        Expression? property7,
-                        Expression? property8,
-                        Expression? property9,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property9, false, false),
-                            selector
-        );
-                }
-                                                                
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6,
-                    Expression<Func<TSender, T7>> property7,
-                    Expression<Func<TSender, T8>> property8,
-                    Expression<Func<TSender, T9>> property9,
-                    Expression<Func<TSender, T10>> property10,
-                    Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8, property9, property10,
-                            (c1, c2, c3, c4, c5, c6, c7, c8, c9, c10) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value, c9.Value, c10.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Expression? property5,
+                            Expression? property6,
+                            Expression? property7,
+                            Expression? property8,
+                            Expression? property9,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property9, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
@@ -1164,144 +1210,149 @@ public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T
                         Expression<Func<TSender, T8>> property8,
                         Expression<Func<TSender, T9>> property9,
                         Expression<Func<TSender, T10>> property10,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, IObservedChange<TSender, T9>, IObservedChange<TSender, T10>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                                sender!.ObservableForProperty(property5, false, false),
-                                sender!.ObservableForProperty(property6, false, false),
-                                sender!.ObservableForProperty(property7, false, false),
-                                sender!.ObservableForProperty(property8, false, false),
-                                sender!.ObservableForProperty(property9, false, false),
-                                sender!.ObservableForProperty(property10, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8, property9, property10,
+                                (c1, c2, c3, c4, c5, c6, c7, c8, c9, c10) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value, c9.Value, c10.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Expression<Func<TSender, T5>> property5,
+                            Expression<Func<TSender, T6>> property6,
+                            Expression<Func<TSender, T7>> property7,
+                            Expression<Func<TSender, T8>> property8,
+                            Expression<Func<TSender, T9>> property9,
+                            Expression<Func<TSender, T10>> property10,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, IObservedChange<TSender, T9>, IObservedChange<TSender, T10>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property5, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property6, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property7, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property8, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property9, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property10, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Expression? property5,
-                        Expression? property6,
-                        Expression? property7,
-                        Expression? property8,
-                        Expression? property9,
-                        Expression? property10,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property9, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property10, false, false),
-                            selector
-        );
-                }
-                                                                
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6,
-                    Expression<Func<TSender, T7>> property7,
-                    Expression<Func<TSender, T8>> property8,
-                    Expression<Func<TSender, T9>> property9,
-                    Expression<Func<TSender, T10>> property10,
-                    Expression<Func<TSender, T11>> property11,
-                    Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8, property9, property10, property11,
-                            (c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value, c9.Value, c10.Value, c11.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Expression? property5,
+                            Expression? property6,
+                            Expression? property7,
+                            Expression? property8,
+                            Expression? property9,
+                            Expression? property10,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property9, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property10, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
@@ -1314,152 +1365,157 @@ public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T
                         Expression<Func<TSender, T9>> property9,
                         Expression<Func<TSender, T10>> property10,
                         Expression<Func<TSender, T11>> property11,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, IObservedChange<TSender, T9>, IObservedChange<TSender, T10>, IObservedChange<TSender, T11>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                                sender!.ObservableForProperty(property5, false, false),
-                                sender!.ObservableForProperty(property6, false, false),
-                                sender!.ObservableForProperty(property7, false, false),
-                                sender!.ObservableForProperty(property8, false, false),
-                                sender!.ObservableForProperty(property9, false, false),
-                                sender!.ObservableForProperty(property10, false, false),
-                                sender!.ObservableForProperty(property11, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8, property9, property10, property11,
+                                (c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value, c9.Value, c10.Value, c11.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Expression<Func<TSender, T5>> property5,
+                            Expression<Func<TSender, T6>> property6,
+                            Expression<Func<TSender, T7>> property7,
+                            Expression<Func<TSender, T8>> property8,
+                            Expression<Func<TSender, T9>> property9,
+                            Expression<Func<TSender, T10>> property10,
+                            Expression<Func<TSender, T11>> property11,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, IObservedChange<TSender, T9>, IObservedChange<TSender, T10>, IObservedChange<TSender, T11>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property5, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property6, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property7, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property8, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property9, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property10, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property11, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Expression? property5,
-                        Expression? property6,
-                        Expression? property7,
-                        Expression? property8,
-                        Expression? property9,
-                        Expression? property10,
-                        Expression? property11,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property9, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property10, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property11, false, false),
-                            selector
-        );
-                }
-                                                                
-    
-    /// <summary>
-    /// WhenAnyValue allows you to observe whenever the value of one or more
-    /// properties on an object have changed, providing an initial value when
-    /// the Observable is set up, unlike ObservableForProperty(). Use this
-    /// method in constructors to set up bindings between properties that also
-    /// need an initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property12">The 12 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12>(
-        this TSender? sender,
-                    Expression<Func<TSender, T1>> property1,
-                    Expression<Func<TSender, T2>> property2,
-                    Expression<Func<TSender, T3>> property3,
-                    Expression<Func<TSender, T4>> property4,
-                    Expression<Func<TSender, T5>> property5,
-                    Expression<Func<TSender, T6>> property6,
-                    Expression<Func<TSender, T7>> property7,
-                    Expression<Func<TSender, T8>> property8,
-                    Expression<Func<TSender, T9>> property9,
-                    Expression<Func<TSender, T10>> property10,
-                    Expression<Func<TSender, T11>> property11,
-                    Expression<Func<TSender, T12>> property12,
-                    Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12, TRet> selector)
-    {
-        return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8, property9, property10, property11, property12,
-                            (c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12) =>
-                                selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value, c9.Value, c10.Value, c11.Value, c12.Value));
-    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property12">The 12 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12>(
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Expression? property5,
+                            Expression? property6,
+                            Expression? property7,
+                            Expression? property8,
+                            Expression? property9,
+                            Expression? property10,
+                            Expression? property11,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property9, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property10, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property11, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+                                                                    
+        
+        /// <summary>
+        /// WhenAnyValue allows you to observe whenever the value of one or more
+        /// properties on an object have changed, providing an initial value when
+        /// the Observable is set up, unlike ObservableForProperty(). Use this
+        /// method in constructors to set up bindings between properties that also
+        /// need an initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property12">The 12 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyValue<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12>(
             this TSender? sender,
                         Expression<Func<TSender, T1>> property1,
                         Expression<Func<TSender, T2>> property2,
@@ -1473,541 +1529,590 @@ public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T
                         Expression<Func<TSender, T10>> property10,
                         Expression<Func<TSender, T11>> property11,
                         Expression<Func<TSender, T12>> property12,
-                        Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, IObservedChange<TSender, T9>, IObservedChange<TSender, T10>, IObservedChange<TSender, T11>, IObservedChange<TSender, T12>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                sender!.ObservableForProperty(property1, false, false),
-                                sender!.ObservableForProperty(property2, false, false),
-                                sender!.ObservableForProperty(property3, false, false),
-                                sender!.ObservableForProperty(property4, false, false),
-                                sender!.ObservableForProperty(property5, false, false),
-                                sender!.ObservableForProperty(property6, false, false),
-                                sender!.ObservableForProperty(property7, false, false),
-                                sender!.ObservableForProperty(property8, false, false),
-                                sender!.ObservableForProperty(property9, false, false),
-                                sender!.ObservableForProperty(property10, false, false),
-                                sender!.ObservableForProperty(property11, false, false),
-                                sender!.ObservableForProperty(property12, false, false),
-                            selector
-        );
-                }
+                        Func<T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12, TRet> selector,
+                        bool isDistinct = true)
+        {
+            return sender!.WhenAny(property1, property2, property3, property4, property5, property6, property7, property8, property9, property10, property11, property12,
+                                (c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12) =>
+                                    selector(c1.Value, c2.Value, c3.Value, c4.Value, c5.Value, c6.Value, c7.Value, c8.Value, c9.Value, c10.Value, c11.Value, c12.Value),
+                                    isDistinct);
+        }
 
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property12">The 12 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        public static IObservable<TRet> WhenAny<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12>(
+                this TSender? sender,
+                            Expression<Func<TSender, T1>> property1,
+                            Expression<Func<TSender, T2>> property2,
+                            Expression<Func<TSender, T3>> property3,
+                            Expression<Func<TSender, T4>> property4,
+                            Expression<Func<TSender, T5>> property5,
+                            Expression<Func<TSender, T6>> property6,
+                            Expression<Func<TSender, T7>> property7,
+                            Expression<Func<TSender, T8>> property8,
+                            Expression<Func<TSender, T9>> property9,
+                            Expression<Func<TSender, T10>> property10,
+                            Expression<Func<TSender, T11>> property11,
+                            Expression<Func<TSender, T12>> property12,
+                            Func<IObservedChange<TSender, T1>, IObservedChange<TSender, T2>, IObservedChange<TSender, T3>, IObservedChange<TSender, T4>, IObservedChange<TSender, T5>, IObservedChange<TSender, T6>, IObservedChange<TSender, T7>, IObservedChange<TSender, T8>, IObservedChange<TSender, T9>, IObservedChange<TSender, T10>, IObservedChange<TSender, T11>, IObservedChange<TSender, T12>, TRet> selector,
+                            bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    sender!.ObservableForProperty(property1, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property2, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property3, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property4, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property5, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property6, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property7, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property8, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property9, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property10, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property11, false, false, isDistinct),
+                                    sender!.ObservableForProperty(property12, false, false, isDistinct),
+                                selector
+            );
+                    }
 
-    /// <summary>
-    /// WhenAny allows you to observe whenever one or more properties on an
-    /// object have changed, providing an initial value when the Observable
-    /// is set up, unlike ObservableForProperty(). Use this method in
-    /// constructors to set up bindings between properties that also need an
-    /// initial setup.
-    /// </summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="property12">The 12 property chain to reference. This will be a expression pointing to a end property or field.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties.</param>
-    public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
-            this TSender? sender,
-                        Expression? property1,
-                        Expression? property2,
-                        Expression? property3,
-                        Expression? property4,
-                        Expression? property5,
-                        Expression? property6,
-                        Expression? property7,
-                        Expression? property8,
-                        Expression? property9,
-                        Expression? property10,
-                        Expression? property11,
-                        Expression? property12,
-                        Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector)
-    {
-                    return Observable.CombineLatest(
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property9, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property10, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property11, false, false),
-                                ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property12, false, false),
-                            selector
-        );
-                }
-    }
 
-/// <summary>A mixin which provides support for subscribing to observable properties.</summary>
-public static class WhenAnyObservableMixin
-{
-    /// <summary>Observe a observable which is set to a property, and automatically subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The first observable to observe.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, x => x.Value!.EmptyIfNull()).Switch();
-    }
+        /// <summary>
+        /// WhenAny allows you to observe whenever one or more properties on an
+        /// object have changed, providing an initial value when the Observable
+        /// is set up, unlike ObservableForProperty(). Use this method in
+        /// constructors to set up bindings between properties that also need an
+        /// initial setup.
+        /// </summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="property1">The 1 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property2">The 2 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property3">The 3 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property4">The 4 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property5">The 5 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property6">The 6 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property7">The 7 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property8">The 8 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property9">The 9 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property10">The 10 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property11">The 11 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="property12">The 12 property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
+        public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
+                this TSender? sender,
+                            Expression? property1,
+                            Expression? property2,
+                            Expression? property3,
+                            Expression? property4,
+                            Expression? property5,
+                            Expression? property6,
+                            Expression? property7,
+                            Expression? property8,
+                            Expression? property9,
+                            Expression? property10,
+                            Expression? property11,
+                            Expression? property12,
+                            Func<IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, IObservedChange<TSender?, object?>, TRet> selector,
+                bool isDistinct = true)
+        {
+                        return Observable.CombineLatest(
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property1, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property2, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property3, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property4, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property5, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property6, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property7, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property8, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property9, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property10, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property11, false, false, isDistinct: isDistinct),
+                                    ReactiveNotifyPropertyChangedMixin
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property12, false, false, isDistinct: isDistinct),
+                                selector
+            );
+                    }
+        }
 
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, (o1, o2) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, (o1, o2, o3) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, (o1, o2, o3, o4) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, (o1, o2, o3, o4, o5) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, (o1, o2, o3, o4, o5, o6) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, (o1, o2, o3, o4, o5, o6, o7) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, (o1, o2, o3, o4, o5, o6, o7, o8) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs9">The 9 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8, Expression<Func<TSender, IObservable<TRet>?>> obs9)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, (o1, o2, o3, o4, o5, o6, o7, o8, o9) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs9">The 9 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs10">The 10 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8, Expression<Func<TSender, IObservable<TRet>?>> obs9, Expression<Func<TSender, IObservable<TRet>?>> obs10)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs9">The 9 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs10">The 10 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs11">The 11 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8, Expression<Func<TSender, IObservable<TRet>?>> obs9, Expression<Func<TSender, IObservable<TRet>?>> obs10, Expression<Func<TSender, IObservable<TRet>?>> obs11)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, obs11, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), o11.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs9">The 9 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs10">The 10 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs11">The 11 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-    /// <param name="obs12">The 12 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
-            public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8, Expression<Func<TSender, IObservable<TRet>?>> obs9, Expression<Func<TSender, IObservable<TRet>?>> obs10, Expression<Func<TSender, IObservable<TRet>?>> obs11, Expression<Func<TSender, IObservable<TRet>?>> obs12)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, obs11, obs12, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11, o12) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), o11.Value!.EmptyIfNull(), o12.Value!.EmptyIfNull()})
-            .Select(x => x.Merge()).Switch();
-    }
+    /// <summary>A mixin which provides support for subscribing to observable properties.</summary>
+    public static class WhenAnyObservableMixin
+    {
+        /// <summary>Observe a observable which is set to a property, and automatically subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The first observable to observe.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, x => x.Value!.EmptyIfNull()).Switch();
+        }
 
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Func<T1?, T2?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, (o1, o2) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Func<T1?, T2?, T3?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, (o1, o2, o3) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Func<T1?, T2?, T3?, T4?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, (o1, o2, o3, o4) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="obs5">The 5 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Expression<Func<TSender, IObservable<T5>?>> obs5,
-                        Func<T1?, T2?, T3?, T4?, T5?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, (o1, o2, o3, o4, o5) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="obs5">The 5 property chain to reference.</param>
-    /// <param name="obs6">The 6 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Expression<Func<TSender, IObservable<T5>?>> obs5,
-                        Expression<Func<TSender, IObservable<T6>?>> obs6,
-                        Func<T1?, T2?, T3?, T4?, T5?, T6?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, (o1, o2, o3, o4, o5, o6) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="obs5">The 5 property chain to reference.</param>
-    /// <param name="obs6">The 6 property chain to reference.</param>
-    /// <param name="obs7">The 7 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Expression<Func<TSender, IObservable<T5>?>> obs5,
-                        Expression<Func<TSender, IObservable<T6>?>> obs6,
-                        Expression<Func<TSender, IObservable<T7>?>> obs7,
-                        Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, (o1, o2, o3, o4, o5, o6, o7) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="obs5">The 5 property chain to reference.</param>
-    /// <param name="obs6">The 6 property chain to reference.</param>
-    /// <param name="obs7">The 7 property chain to reference.</param>
-    /// <param name="obs8">The 8 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Expression<Func<TSender, IObservable<T5>?>> obs5,
-                        Expression<Func<TSender, IObservable<T6>?>> obs6,
-                        Expression<Func<TSender, IObservable<T7>?>> obs7,
-                        Expression<Func<TSender, IObservable<T8>?>> obs8,
-                        Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, (o1, o2, o3, o4, o5, o6, o7, o8) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="obs5">The 5 property chain to reference.</param>
-    /// <param name="obs6">The 6 property chain to reference.</param>
-    /// <param name="obs7">The 7 property chain to reference.</param>
-    /// <param name="obs8">The 8 property chain to reference.</param>
-    /// <param name="obs9">The 9 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Expression<Func<TSender, IObservable<T5>?>> obs5,
-                        Expression<Func<TSender, IObservable<T6>?>> obs6,
-                        Expression<Func<TSender, IObservable<T7>?>> obs7,
-                        Expression<Func<TSender, IObservable<T8>?>> obs8,
-                        Expression<Func<TSender, IObservable<T9>?>> obs9,
-                        Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, T9?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, (o1, o2, o3, o4, o5, o6, o7, o8, o9) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="obs5">The 5 property chain to reference.</param>
-    /// <param name="obs6">The 6 property chain to reference.</param>
-    /// <param name="obs7">The 7 property chain to reference.</param>
-    /// <param name="obs8">The 8 property chain to reference.</param>
-    /// <param name="obs9">The 9 property chain to reference.</param>
-    /// <param name="obs10">The 10 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Expression<Func<TSender, IObservable<T5>?>> obs5,
-                        Expression<Func<TSender, IObservable<T6>?>> obs6,
-                        Expression<Func<TSender, IObservable<T7>?>> obs7,
-                        Expression<Func<TSender, IObservable<T8>?>> obs8,
-                        Expression<Func<TSender, IObservable<T9>?>> obs9,
-                        Expression<Func<TSender, IObservable<T10>?>> obs10,
-                        Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, T9?, T10?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="obs5">The 5 property chain to reference.</param>
-    /// <param name="obs6">The 6 property chain to reference.</param>
-    /// <param name="obs7">The 7 property chain to reference.</param>
-    /// <param name="obs8">The 8 property chain to reference.</param>
-    /// <param name="obs9">The 9 property chain to reference.</param>
-    /// <param name="obs10">The 10 property chain to reference.</param>
-    /// <param name="obs11">The 11 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Expression<Func<TSender, IObservable<T5>?>> obs5,
-                        Expression<Func<TSender, IObservable<T6>?>> obs6,
-                        Expression<Func<TSender, IObservable<T7>?>> obs7,
-                        Expression<Func<TSender, IObservable<T8>?>> obs8,
-                        Expression<Func<TSender, IObservable<T9>?>> obs9,
-                        Expression<Func<TSender, IObservable<T10>?>> obs10,
-                        Expression<Func<TSender, IObservable<T11>?>> obs11,
-                        Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, T9?, T10?, T11?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, obs11, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), o11.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
-    /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
-    /// <param name="sender">The object where the property chain starts.</param>
-    /// <param name="obs1">The 1 property chain to reference.</param>
-    /// <param name="obs2">The 2 property chain to reference.</param>
-    /// <param name="obs3">The 3 property chain to reference.</param>
-    /// <param name="obs4">The 4 property chain to reference.</param>
-    /// <param name="obs5">The 5 property chain to reference.</param>
-    /// <param name="obs6">The 6 property chain to reference.</param>
-    /// <param name="obs7">The 7 property chain to reference.</param>
-    /// <param name="obs8">The 8 property chain to reference.</param>
-    /// <param name="obs9">The 9 property chain to reference.</param>
-    /// <param name="obs10">The 10 property chain to reference.</param>
-    /// <param name="obs11">The 11 property chain to reference.</param>
-    /// <param name="obs12">The 12 property chain to reference.</param>
-    /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
-    public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12>(this TSender? sender,
-                        Expression<Func<TSender, IObservable<T1>?>> obs1,
-                        Expression<Func<TSender, IObservable<T2>?>> obs2,
-                        Expression<Func<TSender, IObservable<T3>?>> obs3,
-                        Expression<Func<TSender, IObservable<T4>?>> obs4,
-                        Expression<Func<TSender, IObservable<T5>?>> obs5,
-                        Expression<Func<TSender, IObservable<T6>?>> obs6,
-                        Expression<Func<TSender, IObservable<T7>?>> obs7,
-                        Expression<Func<TSender, IObservable<T8>?>> obs8,
-                        Expression<Func<TSender, IObservable<T9>?>> obs9,
-                        Expression<Func<TSender, IObservable<T10>?>> obs10,
-                        Expression<Func<TSender, IObservable<T11>?>> obs11,
-                        Expression<Func<TSender, IObservable<T12>?>> obs12,
-                        Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, T9?, T10?, T11?, T12?, TRet> selector)
-        where TSender : class
-    {
-        return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, obs11, obs12, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11, o12) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), o11.Value!.EmptyIfNull(), o12.Value!.EmptyIfNull(), selector))
-            .Switch();
-    }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, (o1, o2) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, (o1, o2, o3) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, (o1, o2, o3, o4) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, (o1, o2, o3, o4, o5) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, (o1, o2, o3, o4, o5, o6) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, (o1, o2, o3, o4, o5, o6, o7) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, (o1, o2, o3, o4, o5, o6, o7, o8) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs9">The 9 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8, Expression<Func<TSender, IObservable<TRet>?>> obs9)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, (o1, o2, o3, o4, o5, o6, o7, o8, o9) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs9">The 9 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs10">The 10 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8, Expression<Func<TSender, IObservable<TRet>?>> obs9, Expression<Func<TSender, IObservable<TRet>?>> obs10)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs9">The 9 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs10">The 10 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs11">The 11 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8, Expression<Func<TSender, IObservable<TRet>?>> obs9, Expression<Func<TSender, IObservable<TRet>?>> obs10, Expression<Func<TSender, IObservable<TRet>?>> obs11)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, obs11, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), o11.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs2">The 2 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs3">The 3 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs4">The 4 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs5">The 5 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs6">The 6 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs7">The 7 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs8">The 8 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs9">The 9 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs10">The 10 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs11">The 11 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+        /// <param name="obs12">The 12 property chain to reference which ends with an observable. This will be a expression pointing to a end property or field which must be an observable.</param>
+                public static IObservable<TRet> WhenAnyObservable<TSender, TRet>(this TSender? sender, Expression<Func<TSender, IObservable<TRet>?>> obs1, Expression<Func<TSender, IObservable<TRet>?>> obs2, Expression<Func<TSender, IObservable<TRet>?>> obs3, Expression<Func<TSender, IObservable<TRet>?>> obs4, Expression<Func<TSender, IObservable<TRet>?>> obs5, Expression<Func<TSender, IObservable<TRet>?>> obs6, Expression<Func<TSender, IObservable<TRet>?>> obs7, Expression<Func<TSender, IObservable<TRet>?>> obs8, Expression<Func<TSender, IObservable<TRet>?>> obs9, Expression<Func<TSender, IObservable<TRet>?>> obs10, Expression<Func<TSender, IObservable<TRet>?>> obs11, Expression<Func<TSender, IObservable<TRet>?>> obs12)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, obs11, obs12, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11, o12) => new[] {o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), o11.Value!.EmptyIfNull(), o12.Value!.EmptyIfNull()})
+                .Select(x => x.Merge()).Switch();
+        }
+
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Func<T1?, T2?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, (o1, o2) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Func<T1?, T2?, T3?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, (o1, o2, o3) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Func<T1?, T2?, T3?, T4?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, (o1, o2, o3, o4) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="obs5">The 5 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Expression<Func<TSender, IObservable<T5>?>> obs5,
+                            Func<T1?, T2?, T3?, T4?, T5?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, (o1, o2, o3, o4, o5) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="obs5">The 5 property chain to reference.</param>
+        /// <param name="obs6">The 6 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Expression<Func<TSender, IObservable<T5>?>> obs5,
+                            Expression<Func<TSender, IObservable<T6>?>> obs6,
+                            Func<T1?, T2?, T3?, T4?, T5?, T6?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, (o1, o2, o3, o4, o5, o6) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="obs5">The 5 property chain to reference.</param>
+        /// <param name="obs6">The 6 property chain to reference.</param>
+        /// <param name="obs7">The 7 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Expression<Func<TSender, IObservable<T5>?>> obs5,
+                            Expression<Func<TSender, IObservable<T6>?>> obs6,
+                            Expression<Func<TSender, IObservable<T7>?>> obs7,
+                            Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, (o1, o2, o3, o4, o5, o6, o7) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="obs5">The 5 property chain to reference.</param>
+        /// <param name="obs6">The 6 property chain to reference.</param>
+        /// <param name="obs7">The 7 property chain to reference.</param>
+        /// <param name="obs8">The 8 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Expression<Func<TSender, IObservable<T5>?>> obs5,
+                            Expression<Func<TSender, IObservable<T6>?>> obs6,
+                            Expression<Func<TSender, IObservable<T7>?>> obs7,
+                            Expression<Func<TSender, IObservable<T8>?>> obs8,
+                            Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, (o1, o2, o3, o4, o5, o6, o7, o8) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="obs5">The 5 property chain to reference.</param>
+        /// <param name="obs6">The 6 property chain to reference.</param>
+        /// <param name="obs7">The 7 property chain to reference.</param>
+        /// <param name="obs8">The 8 property chain to reference.</param>
+        /// <param name="obs9">The 9 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Expression<Func<TSender, IObservable<T5>?>> obs5,
+                            Expression<Func<TSender, IObservable<T6>?>> obs6,
+                            Expression<Func<TSender, IObservable<T7>?>> obs7,
+                            Expression<Func<TSender, IObservable<T8>?>> obs8,
+                            Expression<Func<TSender, IObservable<T9>?>> obs9,
+                            Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, T9?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, (o1, o2, o3, o4, o5, o6, o7, o8, o9) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="obs5">The 5 property chain to reference.</param>
+        /// <param name="obs6">The 6 property chain to reference.</param>
+        /// <param name="obs7">The 7 property chain to reference.</param>
+        /// <param name="obs8">The 8 property chain to reference.</param>
+        /// <param name="obs9">The 9 property chain to reference.</param>
+        /// <param name="obs10">The 10 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Expression<Func<TSender, IObservable<T5>?>> obs5,
+                            Expression<Func<TSender, IObservable<T6>?>> obs6,
+                            Expression<Func<TSender, IObservable<T7>?>> obs7,
+                            Expression<Func<TSender, IObservable<T8>?>> obs8,
+                            Expression<Func<TSender, IObservable<T9>?>> obs9,
+                            Expression<Func<TSender, IObservable<T10>?>> obs10,
+                            Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, T9?, T10?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="obs5">The 5 property chain to reference.</param>
+        /// <param name="obs6">The 6 property chain to reference.</param>
+        /// <param name="obs7">The 7 property chain to reference.</param>
+        /// <param name="obs8">The 8 property chain to reference.</param>
+        /// <param name="obs9">The 9 property chain to reference.</param>
+        /// <param name="obs10">The 10 property chain to reference.</param>
+        /// <param name="obs11">The 11 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Expression<Func<TSender, IObservable<T5>?>> obs5,
+                            Expression<Func<TSender, IObservable<T6>?>> obs6,
+                            Expression<Func<TSender, IObservable<T7>?>> obs7,
+                            Expression<Func<TSender, IObservable<T8>?>> obs8,
+                            Expression<Func<TSender, IObservable<T9>?>> obs9,
+                            Expression<Func<TSender, IObservable<T10>?>> obs10,
+                            Expression<Func<TSender, IObservable<T11>?>> obs11,
+                            Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, T9?, T10?, T11?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, obs11, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), o11.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
+        /// <summary>Monitor a property that is an observable, and subscribe to the most recent emitted value.</summary>
+        /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="obs1">The 1 property chain to reference.</param>
+        /// <param name="obs2">The 2 property chain to reference.</param>
+        /// <param name="obs3">The 3 property chain to reference.</param>
+        /// <param name="obs4">The 4 property chain to reference.</param>
+        /// <param name="obs5">The 5 property chain to reference.</param>
+        /// <param name="obs6">The 6 property chain to reference.</param>
+        /// <param name="obs7">The 7 property chain to reference.</param>
+        /// <param name="obs8">The 8 property chain to reference.</param>
+        /// <param name="obs9">The 9 property chain to reference.</param>
+        /// <param name="obs10">The 10 property chain to reference.</param>
+        /// <param name="obs11">The 11 property chain to reference.</param>
+        /// <param name="obs12">The 12 property chain to reference.</param>
+        /// <param name="selector">The selector which will determine the final value from the properties. This must be an observable.</param>
+        public static IObservable<TRet> WhenAnyObservable<TSender, TRet, T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12>(this TSender? sender,
+                            Expression<Func<TSender, IObservable<T1>?>> obs1,
+                            Expression<Func<TSender, IObservable<T2>?>> obs2,
+                            Expression<Func<TSender, IObservable<T3>?>> obs3,
+                            Expression<Func<TSender, IObservable<T4>?>> obs4,
+                            Expression<Func<TSender, IObservable<T5>?>> obs5,
+                            Expression<Func<TSender, IObservable<T6>?>> obs6,
+                            Expression<Func<TSender, IObservable<T7>?>> obs7,
+                            Expression<Func<TSender, IObservable<T8>?>> obs8,
+                            Expression<Func<TSender, IObservable<T9>?>> obs9,
+                            Expression<Func<TSender, IObservable<T10>?>> obs10,
+                            Expression<Func<TSender, IObservable<T11>?>> obs11,
+                            Expression<Func<TSender, IObservable<T12>?>> obs12,
+                            Func<T1?, T2?, T3?, T4?, T5?, T6?, T7?, T8?, T9?, T10?, T11?, T12?, TRet> selector)
+            where TSender : class
+        {
+            return sender.WhenAny(obs1, obs2, obs3, obs4, obs5, obs6, obs7, obs8, obs9, obs10, obs11, obs12, (o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11, o12) => Observable.CombineLatest(o1.Value!.EmptyIfNull(), o2.Value!.EmptyIfNull(), o3.Value!.EmptyIfNull(), o4.Value!.EmptyIfNull(), o5.Value!.EmptyIfNull(), o6.Value!.EmptyIfNull(), o7.Value!.EmptyIfNull(), o8.Value!.EmptyIfNull(), o9.Value!.EmptyIfNull(), o10.Value!.EmptyIfNull(), o11.Value!.EmptyIfNull(), o12.Value!.EmptyIfNull(), selector))
+                .Switch();
+        }
 }
 
-internal static class ObservableExtensions
-{
-    public static IObservable<T> EmptyIfNull<T>(this IObservable<T> @this)
+    internal static class ObservableExtensions
     {
-        return @this ?? Observable<T>.Empty;
+        public static IObservable<T> EmptyIfNull<T>(this IObservable<T> @this)
+        {
+            return @this ?? Observable<T>.Empty;
+        }
     }
 }
diff --git a/src/ReactiveUI/VariadicTemplates.tt b/src/ReactiveUI/VariadicTemplates.tt
index 2fbd9e110..adab02e46 100644
--- a/src/ReactiveUI/VariadicTemplates.tt
+++ b/src/ReactiveUI/VariadicTemplates.tt
@@ -44,11 +44,13 @@ namespace ReactiveUI
         /// </summary>
         /// <param name="sender">The object where the property chain starts.</param>
         /// <param name="property1">The first property chain to reference. This will be a expression pointing to a end property or field.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
         public static IObservable<TRet> WhenAnyValue<TSender, TRet>(
             this TSender? sender,
-            Expression<Func<TSender, TRet>> property1)
+            Expression<Func<TSender, TRet>> property1,
+            bool isDistinct = true)
         {
-            return sender!.WhenAny(property1, (IObservedChange<TSender, TRet> c1) => c1.Value);
+            return sender!.WhenAny(property1, (IObservedChange<TSender, TRet> c1) => c1.Value, isDistinct);
         }
 
         <# for(int length=1; length <= maxFuncLength; length++) { #>
@@ -69,6 +71,7 @@ namespace ReactiveUI
         /// need an initial setup.
         /// </summary>
         /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
         <# for(int i=1; i <= length; i++) { #>
 /// <param name="property<#=i#>">The <#=i#> property chain to reference. This will be a expression pointing to a end property or field.</param>
         <# } #>public static IObservable<(<#= String.Join(",", templParams) #>)> WhenAnyValue<TSender, <#= String.Join(",", templParamsDec) #>>(
@@ -76,11 +79,13 @@ namespace ReactiveUI
             <# for(int i=1; i <= length; i++) { #>
             Expression<Func<TSender, T<#=i#>>> property<#=i#><# if (i != length) { #>,<# } #>
 
-            <# } #>)
+            <# } #>,
+            bool isDistinct = true)
         {
             return sender!.WhenAny(<#= valuePropertyParams #>,
                                 (<#= valueSelectorParams #>) =>
-                                    (<#= valueSelectorArgs #>));
+                                    (<#= valueSelectorArgs #>),
+                                    isDistinct);
         }
         <# } #>
 
@@ -95,16 +100,19 @@ namespace ReactiveUI
         <# for(int i=1; i <= length; i++) { #>
 /// <param name="property<#=i#>">The <#=i#> property chain to reference. This will be a expression pointing to a end property or field.</param>
         <# } #>/// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
         public static IObservable<TRet> WhenAnyValue<TSender, TRet, <#= String.Join(",", templParamsDec) #>>(
             this TSender? sender,
             <# for(int i=1; i <= length; i++) { #>
             Expression<Func<TSender, T<#=i#>>> property<#=i#>,
             <# } #>
-            Func<<#= String.Join(",", templParams) #>, TRet> selector)
+            Func<<#= String.Join(",", templParams) #>, TRet> selector,
+                        bool isDistinct = true)
         {
             return sender!.WhenAny(<#= valuePropertyParams #>,
                                 (<#= valueSelectorParams #>) =>
-                                    selector(<#= valueSelectorArgs #>));
+                                    selector(<#= valueSelectorArgs #>),
+                                    isDistinct);
         }
 
         /// <summary>
@@ -115,6 +123,7 @@ namespace ReactiveUI
         /// initial setup.
         /// </summary>
         /// <param name="sender">The object where the property chain starts.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
         <# for(int i=1; i <= length; i++) { #>
 /// <param name="property<#=i#>">The <#=i#> property chain to reference. This will be a expression pointing to a end property or field.</param>
         <# } #>/// <param name="selector">The selector which will determine the final value from the properties.</param>
@@ -123,14 +132,15 @@ namespace ReactiveUI
             <# for(int i=1; i <= length; i++) { #>
                 Expression<Func<TSender, T<#=i#>>> property<#=i#>,
             <# } #>
-                Func<<#= selectorTypeParams #>, TRet> selector)
+                Func<<#= selectorTypeParams #>, TRet> selector,
+                            bool isDistinct = true)
         {
             <# if (length == 1){ #>
-                return sender!.ObservableForProperty(property<#=1#>, false, false).Select(selector);
+                return sender!.ObservableForProperty(property<#=1#>, false, false, isDistinct).Select(selector);
             <# }else{ #>
             return Observable.CombineLatest(
                 <# for(int i=1; i <= length; i++) { #>
-                    sender!.ObservableForProperty(property<#=i#>, false, false),
+                    sender!.ObservableForProperty(property<#=i#>, false, false, isDistinct),
                 <# } #>
                 selector
             );
@@ -149,21 +159,23 @@ namespace ReactiveUI
         <# for(int i=1; i <= length; i++) { #>
 /// <param name="property<#=i#>">The <#=i#> property chain to reference. This will be a expression pointing to a end property or field.</param>
         <# } #>/// <param name="selector">The selector which will determine the final value from the properties.</param>
+        /// <param name="isDistinct">if set to <c>true</c> [is distinct].</param>
         public static IObservable<TRet> WhenAnyDynamic<TSender, TRet>(
                 this TSender? sender,
             <# for(int i=1; i <= length; i++) { #>
                 Expression? property<#=i#>,
             <# } #>
-                Func<<#= dynamicSelectorTypeParams #>, TRet> selector)
+                Func<<#= dynamicSelectorTypeParams #>, TRet> selector,
+                bool isDistinct = true)
         {
             <# if (length == 1){ #>
                 return ReactiveNotifyPropertyChangedMixin
-                    .SubscribeToExpressionChain<TSender,object?>(sender, property<#=1#>, false, false).Select(selector);
+                    .SubscribeToExpressionChain<TSender,object?>(sender, property<#=1#>, false, false, isDistinct: isDistinct).Select(selector);
             <# }else{ #>
             return Observable.CombineLatest(
                 <# for(int i=1; i <= length; i++) { #>
                     ReactiveNotifyPropertyChangedMixin
-                        .SubscribeToExpressionChain<TSender,object?>(sender, property<#=i#>, false, false),
+                        .SubscribeToExpressionChain<TSender,object?>(sender, property<#=i#>, false, false, isDistinct: isDistinct),
                 <# } #>
                 selector
             );