Question

In the method below is there a way to know if the type T implement a specific interface IMyInterface2

public IList<T> MyMethod<T>() where T : class, IMyInterface1
{

   return myResult;
}

Update :

Then I use like this

MyMethod<MyClass>();

Myclass implement IMyInterface1 and IMyInterface2

MyMethod<MyClassB>();

Myclass implement IMyInterface1 and NOT IMyInterface2

Answer 1

Sure there is:

public IList<T> MyMethod<T>() where T : class, IMyInterface1
{
    if (typeof(IMyInterface2).IsAssignableFrom(typeof(T)))
    {
        // code here
    }

    return myResult;
}