Visual Studio opening .xml files in Notepad

Posted by Portman on Stack Overflow See other posts from Stack Overflow or by Portman
Published on 2009-12-28T20:12:36Z Indexed on 2010/04/26 19:23 UTC
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visual-studio-2008

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file-association

So I'm happily working on a project making heavy use of custom .xml configuration files this morning.

All of a sudden, whenever I double-click an .xml file in Solution Explorer, it opens in Notepad instead of within Visual Studio.

Thinking that it was the Windows file associations, I right-clicked on a file in Explorer, selected Open With >> Choose Defaults, and selected Visual Studio 2008.

But the problem remains -- now when I open a file from Explorer, Visual Studio Opens, then it opens Notepad.

Needless to say, this is very frustrating, and Google is not much help. Has anyone else ever had this problem, and what did you do about it?

Notes:

This only happens for .xml files. Other text files (.config, .txt) open within Visual Studio just fine.
This has nothing to do with Windows file associations, as Windows open up VS2008 just as it should. This is some crazy problem internal to Visual Studio.
I've also tried Tools >> Options >> General >> Restore File Associations. No luck.
Nothing present in Tools >> Options >> Text Editor >> File Extension
This is what my "Open With" menu looks like for .xml files. As you can see, "XML Editor" is set to the default.

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