C# Delegates

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Delegates:
----------
Delegates are references to methods.
Syntax:  

     visibility-mode delegate-return-type delegate-name(parameters-list);
Example:
     public delegate int mydel(int a,int b);
Here delegates declared is converted internally into a class and that class will be made as a sub class of System.MulticastDelegate and Sysytem.MulticastDelegate is a sub class of System.Delegate;
Every delegate declaration is associated with a method or prototype and it contains a method Invoke(). 
Invoke() signature will be same as that of the delegate.

class arith_oper
    {
        public static int add(int a, int b)
        {
            return(a + b);
        }

        public static int prod(int a, int b)
        {
            return(a * b);
        }
    }
    class Program
    {
        public  delegate int mydel(int a,int b);
        static void Main(string[] args)
        {
            mydel m1 = new mydel(arith_oper.add);

            mydel m2 = new mydel(arith_oper.prod); 

            Console.WriteLine("Sum: " + m1(2 - 3));  

            Console.WriteLine("Product: " + m2.Invoke(6 - 8)); 

        }
    }