private void showUnitsButton_Click(object sender, RoutedEventArgs e) { UnitsGrid.Visibility = Visibility.Visible; OrdersGrid.Visibility = Visibility.Collapsed; lstUnits = bl.GetHostingUnitsByHostId(int.Parse(tb_HostId.Text)).ToList(); lstUnits.RemoveAll(x => x.Status == ActivityStatus.INACTIVE); UnitsViewList.ItemsSource = lstUnits; UnitsViewList.Items.Refresh(); }