Duplex communication using NetTcpBinding - ContractFilter mismatch?

Question

I\'m making slow and steady progress towards having a duplex communication channel open between a client and a server, using NetTcpBinding. (FYI, you can observe my newbie

Answer 1

Kudos to @Allon Guralnek, who helped me notice what was wrong:

On the server side I had:

[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
class WebService : IWebService { ... }

And on the client side I had:

[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, Namespace="http://MyWebService")]
class SiteServer : IWebServiceCallback { ... }

The conflict was between PerCall and PerSession. I just changed the server side to PerSession, and - Houston, we have lift-off!

Now, to get this working with security... watch SO for the next exciting installment in my WCF learning curve! :)