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Unrecognized attribute 'xmlns'.

Created by dave. Last edited by dave, 9 years and 86 days ago. Viewed 1,928 times. #2
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(8 May 2012)

Problem

ASP site says: Unrecognized attribute 'xmlns'.

...usually in reference to some file which ends "web.config" line 2.

Solution

You might receive this error when you have multiple versions of .Net Framework.

Resolution:

  • Launch IIS
  • Go to the properties page for the application.
  • Select "Asp.net" tab, and change the Target Framework to 2.0.
(In my case, changing it to 2.0 did nothing but render the site totally 404 -- but happily(?) I also had 4.x installed, changing to that fixed the problem.
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