C#简单实现事件

using System;
public class EventTest
{
    /// <summary>
    /// Define an event
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    public delegate void MyEventHandler(object sender, System.EventArgs e);
    /// <summary>
    /// All the events
    /// </summary>
    private static class MyEvents
    {
        public static void OutputEvent(object sender, System.EventArgs e)
        {
            Console.WriteLine(string.Format("Your input:{0}",InputString));
        }
        public static void DealTithEmpty(object sender, System.EventArgs e)
        {
            Console.WriteLine(string.Format("Your input was empty!"));
        }
    }
    /// <summary>
    /// Assert an event
    /// </summary>
    private event MyEventHandler myevent;
    /// <summary>
    /// Reserve input string
    /// </summary>
    public static string InputString { get; set; }
    /// <summary>
    /// Load and trigger this event
    /// </summary>
    /// <param name="input"></param>
    public void RaiseEvent(string input)
    {
        InputString=input;
        EventArgs e = new EventArgs();
        if (InputString == null || InputString == string.Empty)
            this.myevent += new MyEventHandler(MyEvents.DealTithEmpty);
        else
            this.myevent += new MyEventHandler(MyEvents.OutputEvent);
        myevent(this, e);
    }
    /// <summary>
    /// Main method
    /// </summary>
    public static void Main()
    {
        bool ifCycle = true;
        while (ifCycle)
        {
            EventTest et = new EventTest();
            Console.Write("Please input:");
            string input = Console.ReadLine();
            if (input.ToLower().Trim()!= "break")
            {
                et.RaiseEvent(input);
            }
            else
            {
                ifCycle = false;
            }
        }
    }
}