using System;
using System.Security.Principal;
using System.Threading;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;
using System.Runtime.Remoting.Messaging;


public class Client {
        static public void Main() {
                GenericIdentity identity=new GenericIdentity("Alice");
                GenericPrincipal principal=new GenericPrincipal(identity, new string[] {"Auditor"});
                Thread.CurrentPrincipal=principal;
                ForeignPrincipal fp=new ForeignPrincipal(Thread.CurrentPrincipal);
                CallContext.SetData("ClientContext", fp);
                TcpChannel channel=new TcpChannel();
                ChannelServices.RegisterChannel(channel);
                IServer server=(IServer) Activator.GetObject(
                        typeof(IServer),
                        "tcp://127.0.0.1:4000/TheServer");
                server.DoSomething();
         }

}