private static IMessageActivity HandleSearch(ITurnContext turnContext, IMessageActivity activity) { // Look at the user input, and figure out what kind of attachment to send. IMessageActivity reply = null; List <ThumbnailCard> cards = null; if (activity.Text.StartsWith("1")) { WebPageList results = WebPagesHelper.BingWebPageSearch(Common.searchText); reply = (turnContext.Activity as Activity) .CreateReply($"## Reading news about {Common.searchText}"); cards = WebPagesHelper.GetHeroCardsForWebPages(results); } else if (activity.Text.StartsWith("2")) { Images pictures = ImageHelper.BingImagesSearch(Common.searchText); reply = (turnContext.Activity as Activity) .CreateReply($"## Showing images about {Common.searchText}"); cards = ImageHelper.GetHeroCardsForImages(pictures); } else if (activity.Text.StartsWith("3")) { Videos recordings = VideoHelper.BingVideosSearch(Common.searchText); reply = (turnContext.Activity as Activity) .CreateReply($"## Showing videos about {Common.searchText}"); cards = VideoHelper.GetHeroCardsForVideos(recordings); } else if (activity.Text.StartsWith("4")) { News articles = NewsHelper.BingNewsSearch(Common.searchText); reply = (turnContext.Activity as Activity) .CreateReply($"## Reading news about {Common.searchText}"); cards = NewsHelper.GetHeroCardsForArticles(articles); } if (cards != null) { cards.ForEach(card => reply.Attachments.Add(card.ToAttachment())); reply.AttachmentLayout = AttachmentLayoutTypes.Carousel; } return(reply); }