Today, Microsoft released the Software Development Kit for Windows Vista and .NET Framework 3.0 Runtime Components. The download is available as an image or web install, here. Size is about 1.2 gigs.
The Microsoft Windows Software Development Kit (SDK) provides the documentation, samples, header files, libraries, and tools you need to develop applications that run on Windows.
The Windows SDK 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 for Vista also supports creating applications for Windows XP, Windows Server? 2003 SP1, and Windows Server 2003 R2.
The Windows SDK documentation contains task-based how-to documentation, API reference topics, and feature overviews to help you develop applications using Win32 and .NET Framework 3.0 APIs. Specific features such as Search, Index, Table of Contents, and navigational topics in the documentation viewer are all available to help users locate necessary topics.
Their is also a Vista Bridge Library discussion on the Microsoft SDK Blog.
I hope will be a long series of blog posts providing sneak previews of and updates to the Vista Bridge sample library that ships with the Windows SDK. Vista Bridge is a collection of samples that provide a way for managed code developers to access many of the new Vista native APIs, and while the feature set in the current shipping builds is quite good, we continue to add more APIs and features every day, with plans to continue doing so through Vista RTM and beyond.
The Microsoft .NET Framework version 3.0 redistributable package installs the common language runtime and associated files required to run applications developed to target the .NET Framework 3.0. Get it here.
For more info check out the Microsoft .net Framework blog.