My asp.net application was written in VS 2008. Recently I upgraded to VS 2012. After upgrade I tried to launch my application and it said I needed SQL Server Express 2012 - so i upgraded it. Now, I am still having issues with the application. Now when I launch the application I am getting the following error in the error list:
Error 1 The custom tool 'MSLinqToSQLGenerator' failed. Object reference not set to an instance of an object.