那很简单

Thats simple

// SystemEvents class is present in Microsoft.Win32
//e.Cancel=true will terminate the log off or shutdown procedure
SystemEvents.SessionEnding += new SessionEndingEventHandler((o, e) => { e.Cancel = true; MessageBox.Show("unable to shutdown computer myApplicetion is running"); });

要在系统关闭时处理(接受/拒绝)应用程序关闭，请处理 ^ ]事件.特别是，请参见 CloseReason [

To handle (accept/reject) app shutdown when the sytem is shutting down, handle the FormClosing[^] event. In particular, see the CloseReason[^] property.

/ravi