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

Example: https://stackoverflow.com/questions/tagged/web.config

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I am sorry if this has been found before, I didn't see anything when I searched for it.

Similiar to this post, but not quite : Dollar sign in URL breaks link

marked as duplicate by Jon Seigel, user134967, Jeff Atwood Mar 25 '10 at 20:17

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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You're looking for https://stackoverflow.com/questions/tagged/web-config

Periods are filtered out, most likely [by-design].