Now I can’t edit CSS files after trying several inactive extensions. I removed all the extensions, but still, Visual Studio throws "Operation could not be completed" when I try to open the file.
How can I get CSS file editing?
Tools / Import and Export Settings - Reset Installation Issue .
In the Tools / Options dialog box , under Environment / General, click Restore File Associations.
Restore File Associations
You know ... you just work on projects, and you don’t have much time for them, as if it were popping up. Anyway, here is the link that worked for me. http://visualstudiogallery.msdn.microsoft.com/a15c3ce9-f58f-42b7-8668-53f6cdc2cd83 - Web Standards Update for Microsoft Visual Studio 2010 Service Pack 1 (SP1).