How to use WCF RIA SERVICES with WPF application?
Here is the link describe the RIA servicive for WPF application http://blogs.msdn.com/b/davrous/archive/2010/12/03/how-to-open-a-wcf-ria-services-application-to-other-type-of-clients-the-soap-endpoint-3-5.aspx I think this is useful for you