private void busList_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            switch (lineOptions.SelectedItem as string)
            {
            case "TRAVELING":
                a = bl.GetAllLinesDriving().ToList();
                break;

            case "NOT_TRAVELING":
                a = bl.GetAllLinesNotDriving().ToList();
                break;
            }



            if (au == "PASSENGER")
            {
                foreach (BO.Line line in a)
                {
                    line.Show = BO.status.REFULING;
                }
            }
            else
            {
                foreach (BO.Line line in a)
                {
                    line.Show = BO.status.READY_FOR_DRIVE;
                }
            }



            lineList.ItemsSource = a;
            lineList.Items.Refresh();
        }