Entity Framework 5 and LocalDb in Visual Studio 2012

 Visual Studio 2012 introduced LocalDb - special edition of SQL Express for developers.

 Problem that I run into when trying to create database was that by default, web.config had SQLExpress datasource specified, not LocalDb.

 After searching and finding a great blog - OdeToCode, turned out that I had to change this section:

<entityFramework>
  <defaultConnectionFactory 
      type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, 
            EntityFramework">
    <parameters>
      <parameter value="v11.0" />
    </parameters>
  </defaultConnectionFactory>
</entityFramework> 

I did change defaultConnectionFactory, but it didn't work, giving me error about not recognizing LocalDbConnectionFactory etc.

Additional parameter has to be added and to be v11.0 for this to work.