How to determine if a type implements an interface with C# reflection

Question

Does reflection in C# offer a way to determine if some given System.Type type models some interface?

public interface IMyInterface {}

public class MyType : IMyInterface {}

// should yield 'true'
typeof(MyType)./* ????? */MODELS_INTERFACE(IMyInterface);

Answer 1

You have a few choices:

1. typeof(IMyInterface).IsAssignableFrom(typeof(MyType))

2. typeof(MyType).GetInterfaces().Contains(typeof(IMyInterface))

For a generic interface, it’s a bit different.

typeof(MyType).GetInterfaces().Any(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IMyInterface<>))