How do I determine if System.Type is a custom type or a Framework type?

Question

I want to distinctly determine if the type that I have is of custom class type (MyClass) or one provided by the Framework (System.String).

Is there any way in refle

Answer 1

Check if the assembly belongs to the CLR library:

myType.Module.ScopeName == "CommonLanguageRuntimeLibrary"

as explained here.