private void btnMenuMayIn_Click(object sender, RoutedEventArgs e)
 {
     if (ucMenuMayIn == null)
     {
         ucMenuMayIn = new UserControlLibrary.UCMenuMayIn(mTransit);
     }
     spNoiDung.Children.Clear();
     ucMenuMayIn.Height = spNoiDung.ActualHeight;
     ucMenuMayIn.Width  = spNoiDung.ActualWidth;
     spNoiDung.Children.Add(ucMenuMayIn);
 }
 private void btnMenuMayIn_Click(object sender, RoutedEventArgs e)
 {
     if (ucMenuMayIn == null)
     {
         ucMenuMayIn = new UserControlLibrary.UCMenuMayIn(mTransit);
     }
     spNoiDung.Children.Clear();
     ucMenuMayIn.Height = spNoiDung.ActualHeight;
     ucMenuMayIn.Width = spNoiDung.ActualWidth;
     spNoiDung.Children.Add(ucMenuMayIn);
 }