Currently, we're allowing Compare with T being any kind of class.

Should we introduce an IDiffResult interface with from which the classes we support as convertible from DiffSafeHandle? Then Diff.Compare<T> would be T : IDiffResult.

This would improve a few aspects:

• No more runtime issues like this
• Type-safe and semantic completion support! I always had to check the sources for the types I can get.
• Customizable from user-side.
• No need to manually maintain the list (which is also outdated) in the exception message and the transformation list.

I know this would bring an implication that DiffSafeHandle would become public, or we can expose a proxy class with methods which interface the native methods.