The Microsoft® Windows® Software Development Kit (SDK) Update for Windows Vista provides documentation, samples, header files, libraries, and tools designed to help you develop Windows applications using both native (Win32) and managed (.NET Framework) technologies.
The Windows SDK Update for Vista includes content for application development with the APIs in Windows Vista, including the .NET Framework 3.0 technologies: .NET Framework 2.0, Windows® Presentation Foundation, Windows® Communication Foundation, Windows® Workflow Foundation, and Windows CardSpace™. This SDK is designed for use with Windows Vista (which includes Framework 3.0). The Windows SDK Update for Vista also supports creating applications for Windows XP, Windows Server® 2003 SP1, and Windows Server 2003 R2. This release of the Windows SDK is compatible with Microsoft® Visual Studio® 2005 and the Visual Studio 2005 extensions for .NET Framework 3.0 (WCF & WPF).
Very useful set of tools