C#에서 이벤트를 사용하여 하나의 인스턴스만 시작

static class Program
    {
        private static System.Threading.Mutex mutex;

        /// 

        ///          。
        /// 
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            mutex = new System.Threading.Mutex(true, "OnlyRun");
            if (mutex.WaitOne(0, false))
            {
                Application.Run(new MainForm());
            }
            else
            {
                MessageBox.Show("       ！", "  ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                Application.Exit();
            }
        }
    }

static class Program
    {
        /// 

        ///          。
        /// 
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            // get the name of our process
            string p = System.Diagnostics.Process.GetCurrentProcess().ProcessName;
            // get the list of all processes by that name
            System.Diagnostics.Process[] processes = System.Diagnostics.Process.GetProcessesByName(p);
            // if there is more than one process
            if (processes.Length > 1)
            {
                MessageBox.Show("        ", "    ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                Application.Exit();
            }
            else
            {
                Application.Run(new MainForm());
            }
        }
    }