防止程序多次启动问题

Question

c#如何编程防止一个程序多次启动

Answer 1

/// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);            Process test = RunningInstance();
            if (test == null)
            {
                //Go on your code
            }
            else
            {
               MessageBox.Show("Application already running!");
            }
        }        public static Process RunningInstance()
        {
            Process current = Process.GetCurrentProcess();
            Process[] processes = Process.GetProcessesByName(current.ProcessName);            foreach (Process process in processes)
            {
                if (process.Id != current.Id)
                {
                    if (Assembly.GetExecutingAssembly().Location.Replace("/ ", "\\ ") ==
                            current.MainModule.FileName)
                    {
                        return process;
                    }
                }
            }
            return null;
        }

Answer 2

Process.GetProcessesByName(Process.GetCurrentProcess().ProcessName).Length > 1