[STAThread] static void Main() {
 bool isAppRunning = false;
 System.Threading.Mutex mutex = new System.Threading.Mutex(true,System.Diagnostics.Process.GetCurrentProcess().ProcessName,out isAppRunning);
 if (!isAppRunning) {
  MessageBox.Show("本程序已經(jīng)在運(yùn)行了，請(qǐng)不要重復(fù)運(yùn)行！");
  Environment.Exit(1);
 }
 else
 {
  Application.EnableVisualStyles();
  Application.SetCompatibleTextRenderingDefault(false);
  Application.Run(new Form1());
 }
}