public void LoadEngineers()
{
//Load Engineers
List <Engineer> engineers = sql.getEngineersAll();
engineers.Sort();
comboBox_EngineerEditRepair.ItemsSource = engineers;
comboBox_EngineerEditRepair.DisplayMemberPath = "NameEngineer";
comboBox_EngineerEditRepair.SelectedIndex = 0;
engineers = null;
}