As I understand it, this is by design.  There was quite a bit of discussion
on this a while back. See the following link:

http://discuss.develop.com/archives/wa.exe?A2=ind0103D&L=DOTNET&D=0&P=68004



-----Original Message-----
From: Wenbin Zhang [mailto:wzhang@[...].COM]
Sent: Thursday, November 15, 2001 1:33 PM
To: DOTNET@[...].COM
Subject: [DOTNET] Thread.CurrentPrincipal lost after making a call to a
remote object?


Question:
  It seems that Thread.CurrentPrincipal object assigned
  to CurrentThread is lost after making a remote call to an
  object hosted by another process.  Is this behavior by
  design, or it is a bug (I am using Beta2 bits)?
  If the behavior is by design, how to understand this??

I have included some sample code below:
In my sample Client code below, the GenericPrincipal
object assigned to the CurrentThread object is LOST
after making a call to the remote object in the
"Server.exe" process.

Client.cs: (Compile: csc /debug+ /r:Server.exe Client.cs)
-------------------------------------------------------------------
using System;
using System.Threading;
using System.Security.Principal;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Http;
using System.Runtime.Remoting.Channels.Tcp;
using System.Runtime.Remoting.Activation;

using TestRemotingNS;

public class RemotingClient
{
    public static void Main()
    {
        string[] roles = {"GBB", "AP"};
        IIdentity alice = new GenericIdentity("alice");
        Thread.CurrentPrincipal = new GenericPrincipal(alice, roles);

        ChannelServices.RegisterChannel(new TcpChannel());
        object[] activationAttributes =
                {new UrlAttribute("tcp://localhost:4242/MyTestService")};

        IPrincipal prin = Thread.CurrentPrincipal;
        string userInfo = "\"" + prin.Identity.Name
                        + "\" is in role \"AP\"?"
                        + prin.IsInRole("AP");
        Console.WriteLine("OSThreadId={0}, CLRThread={1}: {2}",
                       AppDomain.GetCurrentThreadId(),
                       Thread.CurrentThread.GetHashCode(), userInfo);

        // Making an object activation call to a remote server.
        ObjectHandle oh = Activator.CreateInstance("Server",
                                            "TestRemotingNS.TestServer",
                                            activationAttributes);


        prin = Thread.CurrentPrincipal;
        userInfo = "\"" + prin.Identity.Name + "\" is in role \"AP\"? "
                 + prin.IsInRole("AP");
        Console.WriteLine("OSThreadId={0}, CLRThread={1}: {2}",
                        AppDomain.GetCurrentThreadId(),
                        Thread.CurrentThread.GetHashCode(), userInfo);
    }
}

Server.cs: (Compile: csc /debug+ Server.cs)
----------------------------------------------------------------
using System;
using System.Threading;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Http;
using System.Runtime.Remoting.Channels.Tcp;

namespace TestRemotingNS
{
  public class TestServer : MarshalByRefObject
  {
    public string GetInfo()
    {
        string info = "OSThreadId=" + AppDomain.GetCurrentThreadId()
                + ", CLRThread=" + Thread.CurrentThread.GetHashCode();
        return info;
    }
  }

  public class RemotingHost
  {
    static void Main(string[] args)
    {
      RemotingConfiguration.ApplicationName = "MyTestService";

      ActivatedServiceTypeEntry ASTE =
         new ActivatedServiceTypeEntry(typeof(TestRemotingNS.TestServer));

      RemotingConfiguration.RegisterActivatedServiceType(ASTE);

      ChannelServices.RegisterChannel(new TcpChannel(4242));
      Console.ReadLine();
    }
  }
}

Thanks a lot,

Wenbin Zhang
OneSource Information Services, Inc.
300 Baker Avenue
Concord, MA 01742

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