private async void btnDidISee_Click(object sender, RoutedEventArgs e)
        {
            string title = txtDidISee.Text;
            Movie  movie = MovieDO.FindByTitle(title);

            string message = String.Empty;

            if (movie == null)
            {
                message = String.Format("You haven't seen {0}", title);
            }
            else
            {
                EpisodeEntity lastEpisode = RecordDO.GetEpisodesByMovie(movie).LastOrDefault();
                if (lastEpisode == null)
                {
                    message = "You have seen that one!";
                }
                else
                {
                    message = String.Format("Last episode you saw was S{0:D2}E{1:D2}", lastEpisode.Season, lastEpisode.Serie);
                }
            }

            MessageDialog dialog = new MessageDialog(message);
            await dialog.ShowAsync();
        }