private void MakeActive_Checked(object sender, RoutedEventArgs e)
 {
     if (makeActive.IsChecked == true)
     {
         makeActive.Content = "Make Inactive";
         cust          = (ActiveCustomer)Active.SelectedItem;
         cust.IsActive = false;
         active.Remove(cust);
         inactive.Add(cust);
         Refresh();
     }
     else if (makeActive.IsChecked == false)
     {
         makeActive.Content = "Make Active";
         cust          = (ActiveCustomer)Inactive.SelectedItem;
         cust.IsActive = true;
         inactive.Remove(cust);
         active.Add(cust);
         Refresh();
     }
 }
 private void SelectionChanged2(object sender, SelectionChangedEventArgs e)
 {
     customer = InactiveUsers.SelectedItem as ActiveCustomer;
     FalseButton.IsChecked = true;
     UpdateSelected();
 }