using System;

public class Program

{

    public static void Main()

    {

        B b = new B();

        //b.onShowMessage("ME");

        b.onShowEmpty();

    }

    class OriginalHolder{

        public bool ShowMessage(string p){

            Console.WriteLine("Hello " + p);        

            return false;

        }

        public void ShowEmptyMessage(){

            Console.WriteLine("Hello empty");                   

        }

    }

    class B{

        //public delegate void ShowMessageDelegate();

        //public ShowMessageDelegate onShowMessage;

        //public Func<string, bool> onShowMessage;// = ExtractWords;

        public Action onShowEmpty;

        public B(){

            OriginalHolder original = new OriginalHolder();

            //onShowMessage += original.ShowMessage;

            onShowEmpty += original.ShowEmptyMessage;           

        }

    }

}