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

c# reflection interface
Yippie-Ki-Yay picture Yippie-Ki-Yay · Feb 10, 2011 · Viewed 231.2k times · Source

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

Jeff picture Jeff · Feb 10, 2011

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<>))

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