C#检测程序重复开启

https://www.cnblogs.com/aijiao/p/10195879.html

    //禁止程序多次开启
            Process[] p = Process.GetProcessesByName(Process.GetCurrentProcess().ProcessName);
            if (p.Length > 1)
            {
                MessageBox.Show("程序已经打开，请勿重复启动！！！！！！");
                Application.Exit();
            }