using System;

delegate void dele(string s);

public class TestClass

{ 

    static void Good(string s)

    {

        //System.Console.WriteLine("  Good, {0}!", s);

    }

    static void Morning(string s)

    {

        //System.Console.WriteLine("  Morning, {0}!", s);

    }

    public static void Main()

    {

        dele firstdel, secondDel, multiDel, multiMinusfirstdel;

        firstdel = Good;

        secondDel = Morning; 

        multiDel = firstdel + secondDel;

        multiMinusfirstdel = multiDel - firstdel;

        Console.WriteLine("Invoking delegate firstdel:");

        firstdel("A");

        Console.WriteLine("Invoking delegate secondDel:");

        secondDel("B");

        Console.WriteLine("Invoking delegate multiDel:");

        multiDel("C");

        Console.WriteLine("Invoking delegate multiMinusfirstdel:");

        multiMinusfirstdel("D");

        Console.ReadLine();

    }

}