学步园

当你运行一个exe时候，再点击exe将忽略

        [STAThread]
        static void Main()
        {
            bool eExist;
            Mutex MyMutex = new Mutex(true, "OnlyRunOncetime", out eExist);
            if (eExist)
            {
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new frmRecord());
            }
        }