Lately I've run into some unstable behavior with the Web Site Admin pages and I wonder if I've crossed 64bit/32bit lines. I'm working off a Win7 64bit box but only interact with IIS in 32bit mode.
What steps do I take to be sure that, from a Visual Studio / IIS Express / Framework point of view, the 64bit stuff is not used and does not influence anything on my dev machine?
All you have to do is set the Target Platform to 32-bit (x86).
Avoid both the "x64" and "Any CPU" targets.