using System;

​

public delegate void myDelegate(int a,int b);

public class Program

{

    public static void sum(int a,int b){

        Console.WriteLine($"Sum is : {(a+b)}");

    }

    public static void subtract(int a,int b){

        Console.WriteLine($"subtract is : {(a-b)}");

    }

    public static void divide(int a,int b){

        Console.WriteLine($"Division is : {(a/b)}");

    }

    public static void Main()

    {

        Console.WriteLine("Hello World");

        myDelegate del1=new myDelegate(sum);

        del1+=subtract;

        del1.Invoke(1,56);

        del1-=subtract;

        del1+=divide;

        del1.Invoke(1,56);

    }

}