Try to add it to the project, right-click on it in the Solution Explorer,
select Open With... choose an editor and set it as default...

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Carlos J. Quintero (Visual Developer - .NET MVP)
The MZ-Tools all-in-one add-in, now for .NET: http://www.mztools.com
> Is there a way to add a file extension to VS.Net so that it recognizes the
> file as a specific type? For example, can I add the extension ".stg" and
> have VS treat it as an XML file - syntax highlighting, etc.?