static class Program { /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); //Application.Run(new MainForm()); //禁止窗口多开 System.Threading.Mutex instance = new System.Threading.Mutex(true, "MutexName", out bool createdNew); if (createdNew) { Application.Run(new MainForm()); instance.ReleaseMutex(); } else { Application.Exit(); } } }
红色代码