Web.config transformation: Unrecognized attribute 'xmlns:xdt'. Note that attribute names are case-sensitive

Question

I\'m getting this strange intermitent bug in a MVC 3.0 project When I build the project sometimes I get the following error message:

Unrecognized attr

Answer 1

This is kind of a workaround, but you may add the following line to your pre-build commands:

del $(ProjectDir)obj\* /F /S /Q

Right click your project > Properties > Build Events > Pre-build