We've discovered a bug in VS (some betas and maybe, RTM) that leads to
crashes while opening website.
The workaround is to modify web.config:
1) add reference to System.Core before all other assembly references
2) move configSections element to the end of the web.config file
This helped several our customers, hope, it would work for you. If not,
please, do the following:
1) Run WinDbg
2) Run Visual Studio
3) Attach WinDbg to VS
4) open problem website
5) send us WinDbg log
Thanks is advance.
Sergey V. Coox
"Develop with pleasure!"