use type equality instead of .Equals

[SimonCropp]

No description provided.

[StefanOssendorf]

Out of curiosity: What's the benefit using one over the other?

[hurcane]

I see that all of these changes involve System.Type comparisons. If I am remembering correctly, the == operator is stricter than the Equals method. The == operator does reference equality. The Equals method returns true if the underlying types are the same. System.Type.Equals will return true on types that are different but inherit from the same root.