Visual Studio 2010 hangs up when opening a .sql file

Question

I may have an unstable development environment and I need to figure out what might be causing the problem.

I launch VS 2010, and simply open any ordinary (or blank) .sql file and it shows up incorrectly drawn inside the IDE. It draws the document tab, but nothing else. If I type on the keyboard at that point, VS locks up. This only appears to be a problem with files that have the extension ".sql" and has no bearing on the actual content. I do notice that in a project that contains .sql files, the Solution Explorer icon associated with the file is the same one associated with .js files. Not sure if that's useful information or not.

FYI, I've installed the Azure SDK and tools, and the Silverlight 4 SDK and tools. I did find one forum posting HERE, but there was no real answer, more of just a work-around (e.g. don't do that).

Anyone else seen this behavior and figured out what might be wrong?

Answer 1

Problem solved. I managed to get a "Package 'RadLangSvc.Package,...' failed to load." error message. So I searched for that error and found the answer HERE. Buried down in the comments, a guy named Allen zhou had the solution. I was able to resolve the problem by running the "DACProjectSystemSetup_enu.msi" found on the VS2010 Installation CD under X:\WCU\DAC. Although anyone else having this problem may need to re-install all 3 .msi files found in this directory.

I believe the problem was created as a result of installing SQL Server 2008 R2 after installing VS2010.

Thank you guys for your assistance.