IDE0150: Prefer 'null' check over type check

Link to the issue description: https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/style-rules/ide0150

### Overview
>This style rule flags use of the `is {type}` statement when `is not null` can be used instead. Similarly, it flags use of the `is not {type}` statement in favor of `is null`. Using `is null` or `is not null` improves code readability.
