static class Program {     public delegate bool ControlCtrlDelegate(int CtrlType);     [DllImport("kernel32.dll")]     private static extern bool SetConsoleCtrlHandler(ControlCtrlDelegate HandlerRoutine, bool Add);     private static ControlCtrlDelegate cancelHandler = new ControlCtrlDelegate(HandlerRoutine);     public static bool HandlerRoutine(int CtrlType)     {         switch (CtrlType)         {             case 0:                 Console.WriteLine("0工具被强制关闭"); //Ctrl+C关闭                  break;             case 2:                 Console.WriteLine("2工具被强制关闭");//按控制台关闭按钮关闭                  break;         }         Console.ReadLine();         return false;     }      /// <summary>     /// 应用程序的主入口点。     /// </summary>     [STAThread]     static void Main(string[] args)     {         SetConsoleCtrlHandler(cancelHandler, true);         Console.ReadLine();     } }