Serialisation failed

Question

Hello,

I tried to implement a two way communication via remoting. I would like to do it via an observer pattern.
So, I have on Shared dll, which contains an Observer interface and a MessageServiceInterface.
The server implements the Observer interface and the clien too. The MessageService is implemented by
my server and it shared the object via remoting.
So far erverything works. I can add the server Observer and everything works fine, but I can't add the Client obser via
Marshal object.

I get the following runtime exception: Analysis failed. The XML-Key 'a1:http://schemas.microsoft.com/clr/nsassem/Client/Client%2C%20Version%3D1.0.0.0%2C%20Culture%3Dneutral%2C%20PublicKeyToken%3Dnull MessageHandler' isn't assigned to any assembly. (Something similar I have to translate it ;-))

Client:


using System;
using System.Runtime.Remoting;
using Shared;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Http;
using Server;

namespace Client
{
    [Serializable]
    class Client : Observer
    {
        [NonSerialized]
        private IMessageService service;

        public Client()
        {
            HttpChannel channel = new HttpChannel();
            ChannelServices.RegisterChannel(channel, false);
            service = (IMessageService)Activator.GetObject(typeof(IMessageService), "http://localhost:1234/MessageService.soap");
        }

        static void Main(string[] args)
        {
            Client client = new Client();
            client.registerObserver();
            client.read();
        }

        public void read()
        {
            for (; ; )
            {
                String msg = Console.ReadLine();
                service.SendMessageToAll(msg);
            }
        }

        public void update(String msg)
        {
            Console.WriteLine(msg);
        }

        public void registerObserver()
        {
            service.addObserver(this);
        }
    }
}

Server:

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels.Http;
using System.Runtime.Remoting.Channels;
using System.Runtime.Serialization.Formatters;
using System.Collections.Generic;
using Shared;

namespace Server
{
    class ServerStartup : Observer
    {
        private IMessageService service;
        public ServerStartup()
        {
            service = new MessageService();
            service.addObserver(this);
            HttpChannel channel = new HttpChannel(1234);
            ChannelServices.RegisterChannel(channel, false);
            /*RemotingConfiguration.RegisterWellKnownServiceType(
                typeof(CustomerManager),
            "CustomerManager.soap", 
            WellKnownObjectMode.Singleton); */
            RemotingServices.Marshal(service, "MessageService.soap");
        }
        static void Main(string[] args)
        {
            ServerStartup startup = new ServerStartup();
            for (; ; )
            {
                String msg = Console.ReadLine();
                startup.sendMessage(msg);
            }
        }
        public void update(String msg)
        {
            Console.WriteLine(msg);
        }

        public void sendMessage(String msg)
        {
            service.SendMessageToAll(msg);
        }
    }
}

MessageServer:


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Shared;

namespace Server
{
    [Serializable]
    public class MessageService : IMessageService
    {
        private List<Observer> observers;

        public MessageService()
        {
            observers = new List<Observer>();
        }
        public override void SendMessageToAll(string message)
        {
            foreach(Observer observer in observers)
            {
                observer.update(message);
            }
        }

        public override void addObserver(Observer observer)
        {
            observers.Add(observer);
        }

        public override void removeObserver(Observer observer)
        {
            observers.Remove(observer);
        }
    }
}