Windows App - Detecting Running Instance

Code to detect if an windows application instance is already running or not:

static class Program

    {

        ///

        /// The main entry point for the application.

        ///

        [STAThread]

        static void Main()

        {

            if (IsPreviousInstanceRunning)

            {

                MessageBox.Show("Another instance of this application is already running...", "Application already running", MessageBoxButtons.OK, MessageBoxIcon.Information);

            }

            else

            {

                Application.EnableVisualStyles();

                Application.SetCompatibleTextRenderingDefault(false);

                Application.Run(new frmMain());

            }

        }

        private static bool IsPreviousInstanceRunning

        {

            get

            {

                // get the name of our process

                string proc = Process.GetCurrentProcess().ProcessName;

                // get the list of all processes by that name

                Process[] processes = Process.GetProcessesByName(proc);

                // if there is more than one process...

                if (processes.Length > 1)

                    return true;

                return false;

            }

        } 

    }