Delegate

namespace DelegateDemo
{
    delegate void Operation(int a,int b);
    class Program
    {
        static void Add(int a,int b)
        {
            Console.WriteLine("Add:"+(a+b));
        }
        static void Sub(int a, int b)
        {
            Console.WriteLine("Sub:" + (a - b));
        }
        static void Mul(int a, int b)
        {
            Console.WriteLine("Mul:" + (a + b));
        }
        static void Mod(int a, int b)
        {
            Console.WriteLine("Mod:" + (a % b));
        }
        public static void Main(string[] args)
        {
             Operation opAdd= Add;
            Operation opSub = Sub;
            Operation opMul = Mul;
            Operation opMod = Mod;
            opAdd(5,6);
            opSub(5, 6);
            opMul(5, 6);
            opMod(5, 6);

            Console.WriteLine("Multicast Delegate:");
            Operation mul= opAdd + opSub + opMul + opMod;
            mul(10, 3);
        }
    }
}