"Authentication Failure" when calling a method on Remote Object in wpf - wpf

Question

I am developing an application which uses WindowsFormsApplicationBase to enforce Single Instance. I get the following error when calling a method on a Remote object. It works fine if I don't use Single Instance approach.
System.Runtime.Remoting.RemotingException: Authentication failure ---> System.IO.IOException: Unable to read data from the transport connection: The connection was closed.
at System.Net.Security.NegoState.ProcessAuthentication(LazyAsyncResult lazyResult)
at System.Net.Security.NegotiateStream.AuthenticateAsClient(NetworkCredential credential, String targetName, ProtectionLevel requiredProtectionLevel, TokenImpersonationLevel allowedImpersonationLevel)
at System.Runtime.Remoting.Channels.Tcp.TcpClientTransportSink.CreateAuthenticatedStream(Stream netStream, String machinePortAndSid)
Here is my Code:
public class EntryPoint
{
[STAThread]
public static void Main(string[] args)
{
SingleInstanceManager sim = new SingleInstanceManager();
sim.Run(args);
}
}
public class SingleInstanceManager : WindowsFormsApplicationBase
{
private App app;
public SingleInstanceManager()
{
IsSingleInstance = true;
}
protected override bool OnStartup(Microsoft.VisualBasic.ApplicationServices.StartupEventArgs eventArgs)
{
app = new App();
app.InitializeComponent();
app.Run();
return false;
}
protected override void OnStartupNextInstance(StartupNextInstanceEventArgs eventArgs)
{
base.OnStartupNextInstance(eventArgs);
app.Activate();
}
}
This is how I am invoking the Remoting object:
public Hashtable GetData(string[] arg1, string[] arg2)
{
IDataProvider dataProvider = (IDataProvider )Activator.GetObject(typeof(IDataProvider ), "tcp://.....");
Hashtable data = dataProvider.GetData(arg1, arg2);
return data;
}
Thanks in advance.

Answer 1

I found the solution myself.
I used the following to implement single instance(http://www.ai.uga.edu/mc/SingleInstance.html).
[STAThread]
static void Main() // args are OK here, of course
{
bool ok;
m = new System.Threading.Mutex(true, "YourNameHere", out ok);
if (! ok)
{
MessageBox.Show("Another instance is already running.");
return;
}
Application.Run(new Form1()); // or whatever was there
GC.KeepAlive(m); // important!
}