SingleInstance

SingleInstance.cs

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Ipc;
using System.Threading;

namespace SingleInstance
{
    class Program
    {
        const string AppId = "Local\\1DDFB948-19F1-417C-903D-BE05335DB8A4";
        static void Main(string[] args)
        {
            using (Mutex mutex = new Mutex(false, AppId))
            {
                if (!mutex.WaitOne(0))
                {
                    // Another instance is already started
                    try
                    {
                        IpcChannel channel = new IpcChannel();
                        ChannelServices.RegisterChannel(channel, false);
                        SingleInstance app = (SingleInstance)Activator.GetObject(typeof(SingleInstance), string.Format("ipc://{0}/RemotingServer", AppId));
                        app.Execute(args);
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.ToString());
                    }

                    return;
                }

                RegisterIpcServer();

                Console.WriteLine("Started");
                Console.ReadKey();
            }


        }

        private static void RegisterIpcServer()
        {
            IpcChannel channel = new IpcChannel(AppId);
            ChannelServices.RegisterChannel(channel, false);
            RemotingConfiguration.RegisterWellKnownServiceType(typeof(SingleInstance), "RemotingServer", WellKnownObjectMode.Singleton);
        }

        private class SingleInstance : MarshalByRefObject
        {
            public void Execute(string[] args)
            {
                Console.WriteLine("Second instance: " + string.Join(" ", args));
            }
        }
    }
}