private void ComboBox_Loaded(object sender, RoutedEventArgs e) { domainContext = new SchedulerDomainContext(); domainContext.Load<Resource>(domainContext.GetResourceQuery()).Completed += (s, args) => { foreach (var Res in domainContext.Resources) { if (Res.ResourceTypes.DisplayName == "Team") { TeamCB.Items.Add(new ComboBoxItem() { Content = Res.DisplayName, Tag = Res.Id }); } } }; }