ASP.NET MVC 3 - Unable to find the requested .Net Framework Data Provider

Question

Background-info:

I\'m using Microsoft Visual Web Developer 2010 Express.
Info about my (lack of) experience: the problem occured with

Answer 1

Rebuilding the project wont catch config errors in the DBContext section... the build process does not walk through connections, so you can build all day and still bomb out. As suggested above, fix the config so the connection string matches MachineName/SQLInstanceName/DBName with the correct SQL config. Worked just fine by just modifying my web.config in my solution.