What's New in Orcas

The official list
is a little hard to find but here's the overview of the big new WCF features in
Orcas.

• WCF and WF Integration-Workflow Services: The .NET Framework
  3.5 unifies the Windows Workflow Foundation (WF) and Windows Communication
  Foundation (WCF) frameworks so that you can use WF as a way to author
  WCF services or expose your existing WF workflow as a service. This
  enables you to create services that can be persisted, can easily transfer
  data in and out of a workflow, and can enforce application-level
  protocols. For more information, see Creating Workflow Services and
  Durable Services. For code samples, see Workflow Services Samples.
• Durable Services: The .NET Framework 3.5 also introduces
  support for WCF services that use the WF persistence model to persist the
  state information of the service. These durable services persist their
  state information on the application layer, so that if a session is torn
  down and re-created later, the state information for that service can be
  reloaded from the persistence store. For more information, see Creating Workflow Services and
  Durable Services. For a code sample, see Durable Service Sample.
• WCF Web Programming Model: The WCF Web Programming Model
  enables developers to build Web-style services with WCF. The Web
  Programming Model includes rich URI processing capability, support for all
  HTTP verbs including GET, and a simple programming model for working with
  a wide variety of message formats (including XML, JSON, and opaque binary
  streams). For more information, see Web Programming Model. For
  code samples, see Web Programming Model Samples.
• WCF Syndication: WCF now includes a strongly typed object
  model for processing syndication feeds, including both the Atom 1.0
  and RSS 2.0 formats. For more information, see WCF Syndication. For code
  samples, see Syndication Samples.
• WCF and Partial Trust: In .NET Framework 3.5, applications
  running with reduced permissions can use a limited subset of WCF features.
  Server applications running with ASP.NET Medium Trust permissions can use
  the WCF Service Model to create basic HTTP services. Client applications
  running with Internet Zone permissions (such as XAML Browser Applications
  or unsigned applications deployed with ClickOnce) can use the WCF proxies
  to consume HTTP services. In addition, the WCF Web Programming Model
  features (including AJAX and Syndication) are available for use by
  partially trusted applications. For more information, see Partial Trust. For code
  samples, see Partial Trust WCF Samples.
• WCF and ASP.NET AJAX Integration: The integration of WCF with
  the Asynchronous JavaScript and XML (AJAX) capabilities in ASP.NET
  provides an end-to-end programming model for building Web applications
  that can use WCF services. In AJAX-style Web applications, the client (for
  example, the browser in a Web application) exchanges small amounts of data
  with the server by using asynchronous requests. Integration with AJAX
  features in ASP.NET provides an easy way to build WCF Web services that
  are accessible by using client JavaScript in the browser. For more
  information, see AJAX Integration and JSON
  Support. For code samples, see AJAX Samples.
• Web Services Interoperability: In the .NET Framework 3.5, Microsoft
  maintains its commitment to interoperability and public standards and
  introduces support for the new secure, reliable, and transacted Web
  services standards: Web
  Services Reliable Messaging v1.1, Web Services Reliable
  Messaging Policy Assertion v1.1, WS-SecureConversation
  v1.3, WS-Trust
  v1.3, WS-SecurityPolicy
  v1.2, Web
  Services Atomic Transaction (WS-AtomicTransaction) Version 1.1, Web
  Services Coordination (WS-Coordination) Version 1.1, Web Services Policy 1.5 - Framework,
  and Web Services Policy
  1.5 - Attachment. Implementation of these protocols is made available
  using the new standard bindings, <ws2007HttpBinding>
  and <ws2007FederationHttpBinding>,
  which are documented in the Web Services Protocols
  Interoperability Guide. For a code sample, see WS Binding Samples.

Comments

• Anonymous
  January 09, 2008
  I haven&#39;t found much in the last 5 days that is New and Notable but here is a few items of interest

• Anonymous
  May 05, 2008
  Today wraps up the series on detailed messaging changes in Orcas. You can get the whole series here as