Nov 14

Error 1 Unrecognized attribute ‘xmlns:xdt’. Note that attribute names are case-sensitive.

If you get: Error¬†1¬†Unrecognized attribute ‘xmlns:xdt’. Note that attribute names are case-sensitive.¬† you can be searching for hours what is wrong with your web.config.

The case:

  • MVC4 webap
  • using config transformation

Well, I’ve searched hours and hours, but there seems nothing wrong with my web.config. So how to solve this anoying issue:

  • search for the obj folder (it might be hidden)
  • delete it

Problem solved.