Possible Duplicate:
Tags with usability problems - app.config and web.config

There are some questions which are tagged with [.cs], but it is not possible to show them. The following URL results in an empty page:


The same problem exists for other extensions, filenames and paths which are blocked by ASP.NET, ee.g.:

BTW: I guess the [.cs] tag should be replaced with the [C#] tag anyway.

  • 1
    I'm fairly sure this is a duplicate - will have to search
    – ChrisF Mod
    Aug 29, 2010 at 14:15
  • @ChrisF: I thought so as well, but wasn't able to find something.
    – M4N
    Aug 29, 2010 at 14:17
  • Wait, ASP.NET is blocking an extension for a file that doesn't exist?
    – TheLQ
    Aug 29, 2010 at 14:33
  • @TheLQ: with asp.net you can configure handlers for each file-type. By default ".cs" is handled by the HttpForbiddenHandler which denies access to the requested resource.
    – M4N
    Aug 29, 2010 at 14:41

1 Answer 1


OK, a workaround seems to be to put the tag into brackets:


But this should be done automatically by the system, e.g. when clicking the link for the [.cs] tag on the tags page (https://stackoverflow.com/tags).

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