C# WinForm程序防止多开的方法总结 Winform启动的时候，检测是否存在同样的进程名，防止程序多开；方法1：static class Program { /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Process[] processes = Process.GetProcesses(); Process currentProcess = Process.GetCurrentProcess(); bool processExist = false; foreach (Process p in processes) { if (p.ProcessName == currentProcess.ProcessName && p.Id != currentProcess.Id) { processExist = true; } } if (processExist) { Application.Exit(); } else { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } } 方法2：static class Program { /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { string processName = Process.GetCurrentProcess().ProcessName; Process[] processes = Process.GetProcessesByName(processName); //如果该数组长度大于1，说明多次运行 if (processes.Length > 1) { MessageBox.Show("程序已运行，不能再次打开！"); Environment.Exit(1); } else { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } } 利用Mutex互斥对象防止程序多开；static class Program { /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { bool isAppRunning = false; Mutex mutex = new Mutex(true, System.Diagnostics.Process.GetCurrentProcess().ProcessName, out isAppRunning); if (!isAppRunning) { MessageBox.Show("程序已运行，不能再次打开！"); Environment.Exit(1); } Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } }