title: A constructible type deriving from DbContext could not be found in the selected file (EF Power Tools Beta 2 + VS 2012))
body: <p>I'm using VS 2012 (Ultimate) together with Entity Framework Power Tools Beta 2 and entity framework 5.0 (using nuget).</p>
  
  <p>I've created a DbContext class. When I right-click on the corresponding file in the solution explorer and select "Entity Framework / View Entity Data Model (Read-only)", I get the error "A constructible type deriving from DbContext could not be found in the selected file." error in VS 2012. </p>
  
  <p>I tried the workaround described at <a href="http://blogs.msdn.com/b/adonet/archive/2012/04/09/ef-power-tools-beta-2-available.aspx" rel="nofollow">http://blogs.msdn.com/b/adonet/archive/2012/04/09/ef-power-tools-beta-2-available.aspx</a>, but my registry does not contain the key "{BFC24BF4-B994-4757-BCDC-1D5D2768BF29}" in "HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\11.0_Config\BindingPaths\". </p>
  
  <p>After restarting visual studio and following the same steps, a dialog pops up indicating "Exception has been thrown by the target of an invocation".</p>
  
  <p>BTW. I'm able to execute my test application that creates the database from my DbContext and O can insert/delete/etc data in this database. </p>
  
  <p>Any help/hints would be very appreciated.</p>
  
  <p>Kind regards,
  Merijn</p>