using System;

public class Program

{

    interface IFoo {

        void DoSomething() {

            Console.WriteLine("Foo");

        }

    }

    interface IBar : IFoo {

        void IFoo.DoSomething() {

            Console.WriteLine("Bar");

        }

    }

    interface IBaz : IFoo {

    }

    struct BarImpl : IBar {

    }

    struct BazImpl : IBaz {

    }

    public static void Main()

    {

        (new BarImpl{} as IBar).DoSomething();

        (new BarImpl{} as IFoo).DoSomething();

        (new BazImpl{} as IFoo).DoSomething();

    }

}