How to determine if a type implements a specific generic interface type

Assume the following type definitions:

public interface IFoo<T> : IBar<T> {}
public class Foo<T> : IFoo<T> {}

How do I find out whether the type Foo implements the generic interface IBar<T> when only the mangled type is available?

Solution 1:

By using the answer from TcKs it can also be done with the following LINQ query:

bool isBar = foo.GetType().GetInterfaces().Any(x =>
  x.IsGenericType &&
  x.GetGenericTypeDefinition() == typeof(IBar<>));

Solution 2:

You have to go up through the inheritance tree and find all the interfaces for each class in the tree, and compare typeof(IBar<>) with the result of calling Type.GetGenericTypeDefinition if the interface is generic. It's all a bit painful, certainly.

See this answer and these ones for more info and code.