private void MenuItemRemove_Click(object sender, RoutedEventArgs e)
 {
     foreach (RemoteComputer computer in selectedItems)
     {
         ActiveTestbed.Remove(computer);
     }
 }
 public void MenuItemRemoveFromDb_Click(object sender, RoutedEventArgs e)
 {
     foreach (RemoteComputer computer in selectedItems)
     {
         ActiveTestbed.Remove(computer);
         new GeneralUtils().DeleteComputerFromAllTables(computer.ID);
     }
 }