private void btnSoDoBan_Click(object sender, RoutedEventArgs e)
 {
     if (ucSoDoBan == null)
     {
         ucSoDoBan = new UserControlLibrary.UCSoDoBan(mTransit);
         ucSoDoBan.Width = spNoiDung.RenderSize.Width;
         ucSoDoBan.Height = spNoiDung.RenderSize.Height;                
     }
     spNoiDung.Children.Clear();
     spNoiDung.Children.Add(ucSoDoBan);
 }
 private void btnSoDoBan_Click(object sender, RoutedEventArgs e)
 {
     if (ucSoDoBan == null)
     {
         ucSoDoBan        = new UserControlLibrary.UCSoDoBan(mTransit);
         ucSoDoBan.Width  = spNoiDung.RenderSize.Width;
         ucSoDoBan.Height = spNoiDung.RenderSize.Height;
     }
     spNoiDung.Children.Clear();
     spNoiDung.Children.Add(ucSoDoBan);
 }