diff --git a/ReactiveUI.Tests/Android/PropertyBindingTestViews.cs b/ReactiveUI.Tests/Android/PropertyBindingTestViews.cs
index 00414fe5c9..fac5ddc805 100644
--- a/ReactiveUI.Tests/Android/PropertyBindingTestViews.cs
+++ b/ReactiveUI.Tests/Android/PropertyBindingTestViews.cs
@@ -9,7 +9,6 @@
 using Android.App;
 using Android.Widget;
 using Android.Content;
-using ReactiveUI.Android;
 using Xunit;
 
 namespace ReactiveUI.Tests
diff --git a/ReactiveUI/ReactiveCommand.cs b/ReactiveUI/ReactiveCommand.cs
index 13e20dd997..412ed78e26 100644
--- a/ReactiveUI/ReactiveCommand.cs
+++ b/ReactiveUI/ReactiveCommand.cs
@@ -281,6 +281,31 @@ public static ReactiveCommand<object> CreateCombined(params IReactiveCommand[] c
     /// </summary>
     public class ReactiveCommand<T> : IReactiveCommand<T>, IReactiveCommand
     {
+#if NET_45
+        public event EventHandler CanExecuteChanged;
+
+        protected virtual void raiseCanExecuteChanged(EventArgs args)
+        {
+            var handler = this.CanExecuteChanged;
+            if (handler != null) {
+                handler(this, args);
+            }
+        }
+#else
+        public event EventHandler CanExecuteChanged
+        {
+            add {
+                if (canExecuteDisp == null) canExecuteDisp = canExecute.Connect();
+                CanExecuteChangedEventManager.AddHandler(this, value);
+            }
+            remove { CanExecuteChangedEventManager.RemoveHandler(this, value); }
+        }
+
+        protected virtual void raiseCanExecuteChanged(EventArgs args)
+        {
+            CanExecuteChangedEventManager.DeliverEvent(this, args);
+        }
+#endif
         readonly Subject<T> executeResults = new Subject<T>();
         readonly Subject<bool> isExecuting = new Subject<bool>();
         readonly Func<object, IObservable<T>> executeAsync;
@@ -310,7 +335,7 @@ public ReactiveCommand(IObservable<bool> canExecute, Func<object, IObservable<T>
                     canExecuteLatest = x;
 
                     if (fireCanExecuteChanged) {
-                        CanExecuteChangedEventManager.DeliverEvent(this, EventArgs.Empty);
+                        this.raiseCanExecuteChanged(EventArgs.Empty);
                     }
                 })
                 .Publish();
@@ -419,15 +444,6 @@ public bool CanExecute(object parameter)
             return canExecuteLatest;
         }
 
-        public event EventHandler CanExecuteChanged
-        {
-            add {
-                if (canExecuteDisp == null) canExecuteDisp = canExecute.Connect();
-                CanExecuteChangedEventManager.AddHandler(this, value);
-            }
-            remove { CanExecuteChangedEventManager.RemoveHandler(this, value); }
-        }
-
         public void Execute(object parameter)
         {
             ExecuteAsync(parameter).Subscribe();
diff --git a/ReactiveUI/ReactiveList.cs b/ReactiveUI/ReactiveList.cs
index 0945d65a4c..5c9dface8f 100644
--- a/ReactiveUI/ReactiveList.cs
+++ b/ReactiveUI/ReactiveList.cs
@@ -23,6 +23,47 @@ namespace ReactiveUI
     [DebuggerTypeProxy(typeof(CollectionDebugView<>))]
     public class ReactiveList<T> : IReactiveList<T>, IReadOnlyReactiveList<T>, IList
     {
+#if NET_45
+        public event NotifyCollectionChangedEventHandler CollectionChanging;
+
+        protected virtual void raiseCollectionChanging(NotifyCollectionChangedEventArgs args)
+        {
+            var handler = this.CollectionChanging;
+            if (handler != null) {
+                handler(this, args);
+            }
+        }
+
+        public event NotifyCollectionChangedEventHandler CollectionChanged;
+
+        protected virtual void raiseCollectionChanged(NotifyCollectionChangedEventArgs args)
+        {
+            var handler = this.CollectionChanged;
+            if (handler != null) {
+                handler(this, args);
+            }
+        }
+
+        public event PropertyChangingEventHandler PropertyChanging;
+
+        void IReactiveObject.RaisePropertyChanging(PropertyChangingEventArgs args)
+        {
+            var handler = this.PropertyChanging;
+            if (handler != null) {
+                handler(this, args);
+            }
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        void IReactiveObject.RaisePropertyChanged(PropertyChangedEventArgs args)
+        {
+            var handler = this.PropertyChanged;
+            if (handler != null) {
+                handler(this, args);
+            }
+        }
+#else
         public event NotifyCollectionChangedEventHandler CollectionChanging {
             add { CollectionChangingEventManager.AddHandler(this, value); }
             remove { CollectionChangingEventManager.RemoveHandler(this, value); }
@@ -32,6 +73,16 @@ public event NotifyCollectionChangedEventHandler CollectionChanged {
             add { CollectionChangedEventManager.AddHandler(this, value); }
             remove { CollectionChangedEventManager.RemoveHandler(this, value); }
         }
+        
+        protected virtual void raiseCollectionChanging(NotifyCollectionChangedEventArgs e)
+        {
+            CollectionChangingEventManager.DeliverEvent(this, e);
+        }
+
+        protected virtual void raiseCollectionChanged(NotifyCollectionChangedEventArgs e)
+        {
+            CollectionChangedEventManager.DeliverEvent(this, e);
+        }
 
         public event PropertyChangingEventHandler PropertyChanging
         {
@@ -53,6 +104,7 @@ void IReactiveObject.RaisePropertyChanged(PropertyChangedEventArgs args)
         {
             PropertyChangedEventManager.DeliverEvent(this, args);
         }
+#endif
 
         [IgnoreDataMember] Subject<NotifyCollectionChangedEventArgs> _changing;
         [IgnoreDataMember] Subject<NotifyCollectionChangedEventArgs> _changed;
@@ -634,16 +686,6 @@ static IObservable<TObs> refcountSubscribers<TObs>(IObservable<TObs> input, Acti
             });
         }
 
-        protected virtual void raiseCollectionChanging(NotifyCollectionChangedEventArgs e)
-        {
-            CollectionChangingEventManager.DeliverEvent(this, e);
-        }
-
-        protected virtual void raiseCollectionChanged(NotifyCollectionChangedEventArgs e)
-        {
-            CollectionChangedEventManager.DeliverEvent(this, e);
-        }
-
         #region Super Boring IList crap
 
         // The BinarySearch methods aren't technically on IList<T>, they're implemented straight on List<T>
diff --git a/ReactiveUI/ReactiveObject.cs b/ReactiveUI/ReactiveObject.cs
index 898c9785b5..da08f0ecea 100644
--- a/ReactiveUI/ReactiveObject.cs
+++ b/ReactiveUI/ReactiveObject.cs
@@ -24,6 +24,27 @@ namespace ReactiveUI
     [DataContract]
     public class ReactiveObject : IReactiveNotifyPropertyChanged<ReactiveObject>, IHandleObservableErrors, IReactiveObject
     {
+#if NET_45        
+        public event PropertyChangingEventHandler PropertyChanging;
+
+        void IReactiveObject.RaisePropertyChanging(PropertyChangingEventArgs args)
+        {
+            var handler = this.PropertyChanging;
+            if(handler != null) {
+                handler(this, args);
+            }
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        void IReactiveObject.RaisePropertyChanged(PropertyChangedEventArgs args)
+        {
+            var handler = this.PropertyChanged;
+            if (handler != null) {
+                handler(this, args);
+            }
+        }
+#else
         public event PropertyChangingEventHandler PropertyChanging {
             add { PropertyChangingEventManager.AddHandler(this, value); }
             remove { PropertyChangingEventManager.RemoveHandler(this, value); }
@@ -43,6 +64,7 @@ void IReactiveObject.RaisePropertyChanged(PropertyChangedEventArgs args)
         {
             PropertyChangedEventManager.DeliverEvent(this, args);
         }
+#endif
 
         /// <summary>
         /// Represents an Observable that fires *before* a property is about to
diff --git a/ReactiveUI/WeakEventManager.cs b/ReactiveUI/WeakEventManager.cs
index def012de73..515f145267 100644
--- a/ReactiveUI/WeakEventManager.cs
+++ b/ReactiveUI/WeakEventManager.cs
@@ -11,25 +11,27 @@
 
 namespace ReactiveUI
 {
-    public class CanExecuteChangedEventManager : WeakEventManager<ICommand, EventHandler, EventArgs>
+#if !NET_45
+    internal class CanExecuteChangedEventManager : WeakEventManager<ICommand, EventHandler, EventArgs>
     {
     }
 
-    public class PropertyChangingEventManager : WeakEventManager<INotifyPropertyChanging, PropertyChangingEventHandler, PropertyChangingEventArgs>
+    internal class PropertyChangingEventManager : WeakEventManager<INotifyPropertyChanging, PropertyChangingEventHandler, PropertyChangingEventArgs>
     {
     }
 
-    public class PropertyChangedEventManager : WeakEventManager<INotifyPropertyChanged, PropertyChangedEventHandler, PropertyChangedEventArgs>
+    internal class PropertyChangedEventManager : WeakEventManager<INotifyPropertyChanged, PropertyChangedEventHandler, PropertyChangedEventArgs>
     {
     }
 
-    public class CollectionChangingEventManager : WeakEventManager<INotifyCollectionChanging, NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>
+    internal class CollectionChangingEventManager : WeakEventManager<INotifyCollectionChanging, NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>
     {
     }
 
-    public class CollectionChangedEventManager : WeakEventManager<INotifyCollectionChanged, NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>
+    internal class CollectionChangedEventManager : WeakEventManager<INotifyCollectionChanged, NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>
     {
     }
+#endif
 
     /// <summary>
     /// WeakEventManager base class. Inspired by the WPF WeakEventManager class and the code in