using System;
using System.Collections.Generic;
using System.Text;

namespace DelegateApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            string str = "show !!!";
            InitEvent(str);
            Console.ReadLine();
        }
        private static void InitEvent(string showStr)
        {
            //初始化事件参数类，赋值
            InformationEventArgs eventArgs = new InformationEventArgs();
            eventArgs.Information = showStr;

InformationEvent eventer = new InformationEvent();
            InformationCall call = new InformationCall();
            
            eventer.InformationClick+= new InformationHandler(call.ShowInformation);
           
            eventer.OnInformation(eventArgs);
            Console.ReadLine();
        }
    }
    /// <summary>
    /// 事件参数
    /// </summary>
    public class InformationEventArgs : EventArgs
    {
        private string _message;
        public string Information
        {
            get
            {
                return _message;
            }
            set
            {
                _message = value;
            }
        }
    }
    //委托
    public delegate void InformationHandler(object sender,InformationEventArgs e);
    //事件
    public class InformationEvent
    {
        public event InformationHandler InformationClick;
        //触发事件
        public void OnInformation(InformationEventArgs e)
        {
            if (InformationClick != null)
            {
                InformationClick(this, e);//匹配委托  进行InformationEventArgs传值
            }
        }
    }

public class InformationCall
    {
        private string _strInformation;
        public  string InformationString
        {
            get
            {
                return _strInformation;
            }
            set
            {
                _strInformation = value;
            }
        }
        //调用的方法  匹配委托  显示事件参数的值
        public void ShowInformation(object sender, InformationEventArgs e)
        {
            InformationString = e.Information;
            Console.WriteLine(InformationString);
        }
    }
}