54.multicasting delegate in C#

-

 using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;


namespace multicasting_delegate

{

    public delegate void Delegate_op(double a, double b);

    class Program

    {

        static void mul(double x, double y)

        {

            Console.WriteLine("Multiplication : " + x * y);

        }

        static void add(double x, double y)

        {

            Console.WriteLine("Addition : " + (x + y));

        }

        static void div(double x, double y)

        {

            Console.WriteLine("Division : " + x / y);

        }

        static void sub(double x, double y)

        {

            Console.WriteLine("Substraction  : " + (x - y));

        }

        static void Main(string[] args)

        {

            Delegate_op obj = new Delegate_op(mul);


            obj += new Delegate_op(add);

            obj += new Delegate_op(sub);

            obj += new Delegate_op(div);

            

            obj(10, 22);


            Console.WriteLine("==============================");


            obj -= new Delegate_op(add);

            obj -= new Delegate_op(div);


            obj(10, 22);


            Console.Read();

        }

    }

}

OUTPUT:
Multiplication : 220
Addition : 32
Substraction  : -12
Division : 0.454545454545455
==============================
Multiplication : 220
Substraction  : -12

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