There's no longer a need to download the Visual Studio “Orcas” beta to get the .NET Framework 3.5 bits. The .NET Framework 3.5 Beta 1 is a preview release of the latest version of the .NET Framework and works with the Windows SDK for Windows Server code name “Longhorn” and .NET Framework 3.5.
.NET Framework 3.5 is planned to release at the end of 2007 and will ship with Visual Studio code name ”Orcas” and will also continue to be available for separate download from MSDN.
For more detail about the features being introduced in .NET Framework 3.5 and Visual Studio code name “Orcas”, click here. For more information about the .NET Framework, click here.
Samples PM, Windows SDK