using System;

​

public delegate int IntDel(int a, int b);

​

public class Program

{

    public static void Main()

    { 

        IntDel del1 = new IntDel(Add); // Assignment 1

        IntDel del2 = Add;             // Assignment 2

        int c = del1.Invoke(2, 3);     // Invocation 1

        int d = del2(4, 5);            // Invocation 2

        Console.WriteLine(c);

        Console.WriteLine(d);

    }

    static int Add(int a, int b)

    {

        return a + b;

    }

}