Method as a method parameters

We all know that a method parameters which always contains value type and reference type.But it is so abstract to transmit a method to method.This paper,I will give the answer.

Delegate:
Delegate is a method pointer.It can constraint one type of method rely on its method parameters and  return type.If you want to make the delegate point to a method.The method must have the same return type and  the same parmaters type which ordered as the delegate parmaters.

 

The follow code show the delegate as a method parameters!

 

using System;
namespace CallBackDelegate
{
    public delegate string ProcessDelegate(string strone);
    class Program
    {
        static void Main(string[] args)
        {
            Test test = new Test();
            string firstTest = test.Process("wulong", test.ProcessTestOne);
            string secondTest = test.Process("wulong",test.ProcessTestTwo);
            Console.WriteLine(firstTest);
            Console.WriteLine(secondTest);
            Console.Read();
        }
    }
    public class Test
    {
        public string Process(string strone, ProcessDelegate process)
        {
            return process(strone);
        }
        public string ProcessTestOne(string strone)
        {
            return "The first Test is " + strone;
        }
        public string ProcessTestTwo(string strone)
        {
            return "The second Test is " + strone;
        }
    }
}