Переименование TourDataManager.cs для предотвращения коллизий имен. targetFramework установлен в значение 4.5

Clean, Rebuild, System.NotSupportedException: Unable to determine the provider name for provider factory of type 'System.Data.SQLite.SQLiteFactory'. Make sure that the ADO.NET provider is installed or registered in the application config

ADO.NET provider with
invariant name 'System.Data.SqlClient'. Make sure the provider is registered in the 'entityFramework' section of the application config file. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.