using System;

​

public interface IFoo

{

    void DoFoo();

}

​

public class Bar: IFoo

{

    public void DoFoo(){ Console.WriteLine("BAR!"); }

}

​

public class Baz: Bar, IFoo

{

    void IFoo.DoFoo(){ Console.WriteLine("baz explicit!"); }

    public new void DoFoo(){ Console.WriteLine("baz implicit!"); }

}

​

public class Program

{

  public static void Main()

  {

    Baz baz = new Baz();

    baz.DoFoo();

    IFoo foo = baz;

    foo.DoFoo();

    Bar bar = baz;

    bar.DoFoo();

    IFoo foobar = bar;

    foobar.DoFoo();

  }

}