private void brandComboBox_Changed(object sender, RoutedEventArgs e) { modelTextblock.Visibility = Visibility.Visible; modelComboBox.Visibility = Visibility.Visible; Modele.Clear(); Years.Clear(); List <string> modele = new List <string>(); try { modele = (from m in _db.import where m.make == MyItem select m.model).Distinct().ToList(); foreach (var i in modele) { Modele.Add(i); //Console.WriteLine(i); } NotifyPropertyChanged("Modele"); } catch { Console.WriteLine("ex1"); return; } //Console.WriteLine(item.Content.ToString()); //modelComboBox.ItemsSource = modele; }