C#委托

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 练习5
{
   // public delegate void GreetingDelegate(string name);
    class Program
    {
        public delegate void GreetingDelegate(string nn);
        public delegate string GreetingDelegate11(string name);
        private static void EnglishGreeting(string name)
            {
                Console.WriteLine("Morning, " + name);
            }

            private static void ChineseGreeting(string name)
            {
                Console.WriteLine("早上好, " + name);
            }

        private static string ChineseGreeting12(string name)
        {
            Console.WriteLine("早上好, " + name);
            return "123";
        }

        //注意此方法，它接受一个GreetingDelegate类型的方法作为参数
        //private static void GreetPeople(string name, GreetingDelegate MakeGreeting)
        //{
        //    MakeGreeting(name);
        //}


        static void Main(string[] args)
        {
            GreetingDelegate delegate1;
            GreetingDelegate11 GreetingDelegate11;
            delegate1 = EnglishGreeting; // 先给委托类型的变量赋值
            delegate1 += ChineseGreeting;   // 给此委托变量再绑定一个
            GreetingDelegate11 = ChineseGreeting12;
            ChineseGreeting("哈哈");
            // 将先后调用 EnglishGreeting 与 ChineseGreeting 方法
            delegate1("Jimmy Zhang");
            string xxx = ChineseGreeting12("Jimmy Zhang");
            Console.WriteLine("xxx is : " + xxx);

            Console.ReadKey();
            
        }
    }
}