Both were developed on Visual Studio?

Does MS really do OS development in Visual Studio?

[NB I rather like Visual Studio, but I don't think I'd do OS development using it]

I am quite sure they don't use Emacs on Linux ;-)

Yeah, being eVIl, they probably use Vi.

As rms might say, "vi vi vi, the number of the beast"

Well... I assume they could use Monodevelop on BSD...

There certainly seemed to be people using Emacs on Macs :)

To develop WinMo 7? Very unlikely.

Why not? Note that it's not necessary to build in Visual Studio to use VS as an IDE.

What then?

I don't know - it was a genuine question!

[Edit - if there any current or ex Microsoft people who could answer this I'd love to know about the set of tools actually used to develop Windows]

Yes. VS, amongst other tools, is used to develop "Windows." (Where "Windows" is amalgamated thousands of separate projects with their own bits.)

This is the Microsoft. The company with an almost fanatical commitment to dogfooding.

.NET