using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace LandmaExpressionDemo{    class Program    {        static void Main(string[] args)        {            //anonymous method            Action ac = delegate() { Console.WriteLine("hello delegate"); };            ac();            //Use Action
     
       to create anonymous method with parameters            Action
      
        ac2 = delegate(string strMessage) { Console.WriteLine(strMessage); };            ac2("hello world2");            //Pass the anonymous method to another method as parameter            ActionHelper(delegate(string strMessage) { Console.WriteLine(strMessage); });            //use landmar expression as parameter to another method            ActionHelper(fw => Console.WriteLine(fw));            //Use lambda expression as a delegate            Action ac3 = () => Console.WriteLine("hello ac3");            ac3();        }        public delegate void DisplayMessageDelegate(string strMesssage);        public static void ActionHelper(Action
       
         ac)        {            ac("hello world3");        }        //Useful references        //1. http://msdn.microsoft.com/en-us/library/018hxwa8.aspx        //2. http://msdn.microsoft.com/en-us/library/bb549151.aspx        //3. http://msdn.microsoft.com/en-us/library/bb397687.aspx        //4. http://msdn.microsoft.com/en-us/library/bb534960.aspx    }}