Reliability in WCF Polling Duplex Binding

Question

I have a WCF Polling Duplex Service for silverlight clients. I wanted to add Reliability to the service but first I got this error.

The message version of the outgoing message (Soap11 (http://schemas.xmlsoap.org/soap/envelope/) AddressingNone (http://schemas.microsoft.com/ws/2005/05/addressing/none)) does not match that of the encoder (Soap12 (http://www.w3.org/2003/05/soap-envelope) Addressing10 (http://www.w3.org/2005/08/addressing)). Make sure the binding is configured with the same version as the message.

I changed the config files and I'm now getting the error below. Is reliability supported in WCF Polling Duplex?

Unrecognized element 'reliableSession' in service reference configuration. Note that only a subset of the Windows Communication Foundation configuration functionality is available in Silverlight.

Answer 1

I think the problem isn't the usage of WCF polling duplex, but Silverlight in general. It supports only a subset of WCF and according to this article reliable sessions are not supported. A quotation:

"More advanced bindings and binding elements, such as the ones dealing with queues, reliable sessions, transactions, message-level security (such as WS-Security), peer-to-peer messaging, and transports other than HTTP, HTTPS, and TCP are not provided in Silverlight 4."