1 //定义处理程序委托
 2 public delegate bool ConsoleCtrlDelegate(int ctrlType);
 3 //导入SetCtrlHandlerHandler API
 4 [DllImport("kernel32.dll")]
 5 private static extern bool SetConsoleCtrlHandler(ConsoleCtrlDelegate HandlerRoutine, bool Add);
 6 //当用户关闭Console时，系统会发送次消息
 7 private const int CTRL_CLOSE_EVENT = 2;
 8 //Ctrl+C，系统会发送次消息
 9 private const int CTRL_C_EVENT = 0;
10 //Ctrl+break，系统会发送次消息
11 private const int CTRL_BREAK_EVENT = 1;
12 //用户退出（注销），系统会发送次消息
13 private const int CTRL_LOGOFF_EVENT = 5;
14 //系统关闭，系统会发送次消息
15 private const int CTRL_SHUTDOWN_EVENT = 6;

 1 //处理程序例程，在这里编写对指定事件的处理程序代码注意：在VS中调试执行时，在这里设置断点，但不会中断；会提示：无可用源
 2 private static bool HandlerRoutine(int ctrlType)
 3 {
 4     Console.WriteLine(ctrlType);
 5     switch (ctrlType)
 6     {
 7         case CTRL_C_EVENT:
 8             Console.WriteLine("C");
 9             return true; //这里返回true，表示阻止响应系统对该程序的操作  
10                          //break;
11         case CTRL_BREAK_EVENT:
12             Console.WriteLine("BREAK");
13             return true;
14         case CTRL_CLOSE_EVENT:
15             Console.WriteLine("CLOSE");
16             return true;
17         case CTRL_LOGOFF_EVENT:
18             Console.WriteLine("LOGOFF");
19             return true;
20         case CTRL_SHUTDOWN_EVENT:
21             Console.WriteLine("SHUTDOWN");
22             return true;
23     }
24     //return true;//表示阻止响应系统对该程序的操作
25     return false;//忽略处理，让系统进行默认操作
26 }

 1 public Program()
 2 {
 3     ConsoleCtrlDelegate consoleDelegete = new ConsoleCtrlDelegate(HandlerRoutine);
 4     bool bRet = SetConsoleCtrlHandler(consoleDelegete, true);
 5     if (bRet == false) //安装事件处理失败
 6     {
 7         Console.WriteLine("error");
 8         while (true)
 9         {
10             Console.WriteLine("...");
11             Thread.Sleep(1000);
12         }
13     }
14     else
15     {
16         Console.WriteLine("ok");
17         while (true)
18         {
19             Console.WriteLine("...");
20             Thread.Sleep(1000);
21         }
22     }
23 }

1 static void Main(string[] args)
2 {
3     Program cls = new Program();
4     //Console.ReadKey();
5 }