委托 和 事件在 .Net Framework中的应用非常广泛，然而，较好地理解委托和事件对很多接触C#时间不长的人来说并不容易。-Delegates and events in Net Framework in a very wide, however, better understanding of delegates and events is not easy for a lot of contact with C# long time.

小闹钟程序，获取系统当前时间，可添加或删除闹铃提醒事件-Small alarm clock program, to obtain the current time, you can add or delete an alarm to remind the incident. . .