Saturday, December 22, 2007

using System;
namespace RationalExpression
{
    class Program
    {
        //declare the delegate
        delegate void MinimalDelegate();
 
        static void Main(string[] args)
        {
            //create instance of the delegate
            MinimalDelegate instanceOfMinimalDelegate;

            //1. subscribe a named method 
            instanceOfMinimalDelegate = NamedMethod;

            //2. subscribe an anonymous method 
            instanceOfMinimalDelegate += delegate
                       {
                           Console.WriteLine("Anonymous method.");
                       };

            //3. subscribe using a lambda expression 
            instanceOfMinimalDelegate += () =>
            {
                Console.WriteLine("Lambda expression.");
            };

            //call all subscribers
            instanceOfMinimalDelegate();

            Console.ReadLine();
        }
        static void NamedMethod()
        {
            Console.WriteLine("Named method.");
        }
    }
}