Microsoft.Win32命名空间下面的SystemEvents类，他有一个静态的事件SessionEnding在系统注销或者关机时发生，此事件只有在winform的程序下有效，而在控制台程序下面无效，不能激发事件；还有一点我们必须在程序推出时将加上的事件移除掉，否则就容易造成内存溢出。 -Microsoft.Win32 naming the space below SystemEvents category, He has a static events SessionEnding or cancellation of the system shutdown occurred, Only in this incident winform procedures effective, and the console and void following procedures, not motivated incidents; Another point we must procedures will be introduced to remove the incident with the swap, otherwise it is easy to cause memory overflow.