private void Btn_NewVehicles_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            viewNVcar            = new ViewNewVehicles();
            viewNVcar.RoleType   = RoleType;
            viewNVcar.Department = Department;

            if (RoleType == "SalesMan" || RoleType == "Mechanic" || RoleType == "Surbordinate")
            {
                viewNVcar.can_Delete.Visibility = Visibility.Collapsed;
                _mainFrame.Navigate(viewNVcar);
            }

            else
            {
                _mainFrame.Navigate(viewNVcar);
            }
        }
        private void Can_AddNewCar_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            ViewNewCar = new ViewNewVehicles();
            AddNewCar  = new AddNewVehicles();

            ViewNewCar.NVehicle_page = null;
            DependencyObject currParent = VisualTreeHelper.GetParent(this);

            while (currParent != null && ViewNewCar.NVehicle_page == null)
            {
                ViewNewCar.NVehicle_page = currParent as Frame;
                currParent = VisualTreeHelper.GetParent(currParent);
            }

            if (ViewNewCar.NVehicle_page != null)
            {
                ViewNewCar.NVehicle_page.Source = new Uri("AddNewVehicles.xaml", UriKind.Relative);
            }
        }