Events - Hello Goodbye

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Events2
{

    delegate void YouSayYes();
    delegate void YouSayStop();

    class John{

        public event YouSayYes yousayyes;
        public event YouSayStop yousaystop;


        public void Sing()
        {
            Console.WriteLine("I say yes");
            if (yousayyes != null) yousayyes();

            Console.WriteLine("I say stop");
            if (yousayyes != null) yousaystop();



        }






    }


    class George{

        public void ISayNo(){

            Console.WriteLine("I say no !!");
        }


        public void ISayGo()
        {

            Console.WriteLine("I say Go Go gooooooooo !!");
        }


    }


    class Program
    {
        static void Main(string[] args)
        {

             George georgie = new George();

             John Lennon = new John();


            Lennon.yousayyes +=new YouSayYes(  georgie.ISayNo    );
            Lennon.yousaystop += new YouSayStop(  georgie.ISayGo   );

            Lennon.Sing();


            Console.ReadKey();


        }
    }
}