Hello. I have a database on MS SQL Server 2014 Express LocalDB. Lets call this database 'My_Db'. My_Db database has the folowing hierarchy: highest-level master table called 'Devices' has 'Id' field that is primary key. Devices table has one detail table called 'SavedSessions" which has 'Id' field that is primary key and 'Devices_Id' field that is foreign key referenced to Devices.Id field. SavedSesions table has (in its turn) two detail tables: SavedSessionEventLogs and SavedSessionRegisters. Each one of this last two tables has 'SavedSessions_Id' field which is foreign key referenced to SavedSessions.Id field. In my client WPF MVVM application I need to display these four tables in master/detail hierarchy but this herarchy must not be nested. So each of this table must be displayed in its own grid (for example RadGridView). So if I select record in Device table' grid then content of SavedSession table' grid must be accordingly changed and the first record must be selected there. This accordingly entails the appropriate changing of content of SavedSessionEventLogs and SavedSessionRegisters tables. I want to build this master/detail view using QueryableEntityCollectionView and four instance of RadGridView. I had browsed many appropriate information in Google but not found any useful information. So I'll be very grateful if you give me an example of such an application.