What is NetFx in the Windows SDK?

What is NetFx, in the context of the Windows SDK? What differentiates NetFx tools from the tools in the regular SDK bin directory?

I noticed that the version of sgen.exe in C:\Program Files\Microsoft SDKs\Windows\v7.0A\bin\ was built against .NET 2.0, 开发者_开发百科but the version in C:\Program Files\Microsoft SDKs\Windows\v7.0A\bin\NETFX 4.0 Tools\ was built against .NET 4.0.

Update: After a little more searching I found hints that NetFx is the "new" name for WinFx, which was originally a branding intended to convey ".NET with some extra stuff".

http://blogs.msdn.com/ianm/archive/2006/04/19/578851.aspx

http://channel9.msdn.com/posts/Duncanma/Jason-Zander-on-the-WinFX-to-NET-FX-30-rename/

Is this right?

NetFx is apparently just shorthand for "Microsoft .NET Framework."