Checking if my object implements a generic interface in C#

Question

I have that interface :

public interface IEntityWithTypedId<T>{}

And have both classes :

public abstract class EntityWithTypedId<TId> : IEntityWithTypedId<TId>{...}
public abstract class Entity : EntityWithTypedId<int>{...}

So I have entities like those:

public class TestA : Entity
public class TestB : EntityWithTypedId<string>
public class TestC : EntityWithTypedId<byte>

How can I check if my entities implements IEntityWithTypedId ?

Thanks

Before I answer, I'd like to fully understand the situation: How would you check if it weren't a generic interface? — O. R. Mapper, Apr 09 '14 at 12:48
possible duplicate of [How to determine if a type implements a specific generic interface type](http://stackoverflow.com/questions/503263/how-to-determine-if-a-type-implements-a-specific-generic-interface-type) — magnattic, Apr 09 '14 at 18:42

score 5 · Accepted Answer · answered Apr 09 '14 at 12:52

5

typeof(TestA).GetInterfaces()
    .Any(i => i.GetGenericTypeDefinition() == typeof(IEntityWithTypedId<>))

answered Apr 09 '14 at 12:52

Julien Roncaglia

No, open generic types are only allowed in a few places, and the is operator isn't one of them – Julien Roncaglia Apr 09 '14 at 13:02

1 Answers1