WinForm exe应用多开检测 Mutex锁

在你的程序入口中进行替换

bool createNew;
            using (System.Threading.Mutex mutex = new System.Threading.Mutex(true, Application.ProductName, out createNew))
            {
                if (createNew)
                {
                    Application.EnableVisualStyles();
                    Application.SetCompatibleTextRenderingDefault(false);
                    Application.Run(new Form1());
                }
                else
                {
                    MessageBox.Show("应用程序已经在运行中...", "多开检测", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    System.Threading.Thread.Sleep(1000);
                    System.Environment.Exit(1);
                }
            }