C#

using System.Runtime.Remoting...
//etc...

namespace MyService
{
    public class SimServer
    {
        private int listeningPort = 17998;
        private TcpChannel channel;

        //Look here :)
        public int justATestVariable = 123;

        //etc...

        RemotingConfiguration.RegisterWellKnownServiceType(
          typeof(MyService.ServerObj), "TheServer",
          WellKnownObjectMode.Singleton);

        //etc...


    }

    public class ServerObj : MarshalByRefObject, IRemoteEntity
    {
        //etc...
        public String SendMessage(String message) {
           //etc...

           //To Reply, i need variable justATestVariable...

        }
    }
}

<br />
namespace MyService<br />
{<br />
    public class SimServer<br />
    {<br />
        static public int justATestVariable = 123;<br />
        //etc...<br />
    }<br />
<br />
    public class ServerObj : MarshalByRefObject, IRemoteEntity<br />
    {<br />
        int myCopy = SimServer.justATestVariable;<br />
    }<br />
}<br />

public class Server
{
	/// <summary>
	/// This is the only existing instance of Server.
	/// </summary>
	private static readonly Server	_instance = new Server();
 

	/// <summary>
	/// Make the constuctor private.
	/// </summary>
	private Server()
	{
	}
 

	/// <summary>
	/// Get access to the Server's instance.
	/// </summary>
	public static Server Instance
	{
		get{ return Server._instance; }
	}
}