Public Preview Visual Studio 2013
The download link for the Visual Studio 2013 preview is here. It is available under a "go-live" license. The .Net 4.5.1 preview installs as part of the VS 2013 preview and is also included in all installations of the Windows 8.1 preview. The new .Net preview also is available for separate installation into Windows 8, Windows 7, Windows Vista and corresponding Windows Server releases.