delegate in c#

Delegates are roughly similar to function pointers in C++.
A delegate declaration defines a reference type that can be used to encapsulate a method with a specific signature and can be used later.

How to use

The type safety of delegates requires the function you pass as a delegate to have the same signature as the delegate declaration.

See the fallowing program for more information on using delegates.

 namespace delegatess
{
    //Create a new category
    public delegate int MyDelegate(int x, int y);
    public class MyDelegateProgram
    {
        public static int FunAdd(int x, int y)
        {
            return x + y;
        }

        public static int FunMultiply(int x, int y)
        {
            return x * y;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            //instance and initialization
            MyDelegate DelAdd = new MyDelegate(MyDelegateProgram.FunAdd);
            MyDelegate DelMul = new MyDelegate(MyDelegateProgram.FunMultiply);

            //invoking function using delegates
            Console.WriteLine("Addition : " + DelAdd(4, 5));
            Console.WriteLine("Multiplication : " + DelMul(4, 5));

            //array of Delegates-----------
            Console.WriteLine("Using Array of Delegate");

            MyDelegate[] arrDelegates;
            arrDelegates = new MyDelegate[2]; //size of delegate array
            arrDelegates[0] = new MyDelegate(MyDelegateProgram.FunAdd);
            arrDelegates[1] = new MyDelegate(MyDelegateProgram.FunMultiply);

            foreach (MyDelegate item in arrDelegates)
            {
                Console.WriteLine(item(4, 5));
            }
            Console.ReadKey();
        }
    }
}

Hope this helps