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