public MainWindow() { InitializeComponent(); // Initialize the client cache and the client scope. _clientCache = new EntityClientCache(new NORTHWNDEntities()); _scope = new EntityClientScope(_clientCache); // Bind a combo box to the list of cities // using a live view of customers grouped by city. comboCity.ItemsSource = (from c in _scope.GetItems <Customer>() group c by c.City into g orderby g.Key select new { City = g.Key, Customers = g }).AsDynamic(); }