.Net framework 3.5 beta1 - get now for new features
If you are building on the new features in the .NET Framework 3.0, such as Windows Workflow Foundation (WF), Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF), and Windows CardSpace, you'll want to preview the
The .NET Framework 3.5 Beta 1 release, which will ship with Visual Studio 2008. .NET Framework 3.5 adds several new features, including integration of Language Integrated Query (LINQ); ASP.NET AJAX; new Web protocol support for building WCF services including AJAX, JSON, REST, POX, RSS, and ATOM; full tooling support for WF, WCF, and WPF; and new classes in the base class library (BCL).