private async Task SendCreateNewJobPostingMessage(IDialogContext context) { IMessageActivity reply = context.MakeMessage(); reply.Attachments = new List <Attachment>(); AdaptiveCard card = CardHelper.CreateCardForNewJobPosting(); Attachment attachment = new Attachment() { ContentType = AdaptiveCard.ContentType, Content = card }; reply.Attachments.Add(attachment); await context.PostAsync(reply); }