using System;

public class Program

{

    public static void Main()

    {

        IPostProcess i = new ActionItems();

        i.EndProcess(); 

    }

}

​

interface IPostProcess

{

    void EndProcess() { Console.WriteLine("IPostProcess"); }

}

​

interface IExtnededPostProcess : IPostProcess

{

    void Do();

}

​

class ActionItems : IExtnededPostProcess 

{

    public void Do(){}

​

    public void EndProcess() { Console.WriteLine("ActionItems"); }

} 

​

​