delegate in c# with example

Multicast Delegate Example in C#.Net

What are Multicast delegate, type and use?

The multicast delegate is hold the references of more than one methods within the delegate object using the (+=) operator.
1.      Delegate is added using the (+=) operator. 
2.      Delegate is removed using the (-=) operator. 

Example for Multicast Delegate as following,

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

namespace MulticastDelegateExample
{
    public delegate int MulticastDelegateName(int num1, int num2);

    public class MulticastClass
    {

        public static int Add(int num1, int num2)
        {
            return num1 + num2;
        }
        public static int Sub(int num1, int num2)
        {
            return num1 - num2;
        }
        static void Main(string[] args)
        {
            //Create the Add Delegate Instance
            MulticastDelegateName objDelegt = new MulticastDelegateName(Add);
            
            Console.WriteLine("Please enter numbers!");

            int num1 = Int32.Parse(Console.ReadLine());
            int num2 = Int32.Parse(Console.ReadLine());

            int AddRest = objDelegt(num1, num2);
            Console.WriteLine("Result :" + AddRest);

            //Create the Sub Delegate Instance
            objDelegt += new MulticastDelegateName(Sub);
            int subRest = objDelegt(num1, num2);
            Console.WriteLine("Result :" + subRest);

            Console.ReadLine();
        }
    }
}

The Output as given below,

Please enter numbers!
num1 = 20
num2 = 10

Results: Add: 30 and Sub: 10
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