Run one instance from the application

Question

I have a windows application (C#) and i need to configure it to run one instance from the application at the time , It means that one user clicked the .exe file and the appl

Answer 1

Assuming you are using C#

        static Mutex mx;
        const string singleInstance = @"MU.Mutex";
        /// 

        /// The main entry point for the application.
        /// 
        [STAThread]
        static void Main()
        {
            try
            {
                System.Threading.Mutex.OpenExisting(singleInstance);
                MessageBox.Show("already exist instance");
                return;
            }
            catch(WaitHandleCannotBeOpenedException)
            {
                mx = new System.Threading.Mutex(true, singleInstance);

            }
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new MainForm());
        }