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Digging around the settings, Google and Super User, I haven't found how to do this.

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2 Answers 2

up vote 8 down vote accepted

You can also do this from the UI:

Settings > Style Configurator

Select "XML" in the Language list (1) and add "csproj" to the "User ext." field (2):

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You'll need to edit the langs.xml file in Notepad++'s installation directory, which is usually C:\Program Files\Notepad++. Just find the XML section near the bottom of the file and add "proj" to the list of XML extensions.

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Thanks. This is why I love Super User :) –  ripper234 Oct 19 '10 at 10:17
You'll have to use a different editor to do it this way. Notepad++ will overwrite langs.xml on exit. ChrisF's answer is probably the correct way to do it (and the reason langs.xml gets overwritten). –  Velociraptors Oct 19 '10 at 19:11

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