using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

     void Foo<T>(T t) where T : IMyInterface1

     {

​

     }

     void Foo<T>(T t) where T : IMyInterface2

     {

​

     }

}

public interface IMyInterface { }

public interface IMyInterface1 : IMyInterface { }

public interface IMyInterface2 : IMyInterface { }