static private void AddUser() { TopicDTO topic = new TopicDTO(); topic.UsersID = currentUser.IDUser; Console.Write("Please enter Title: "); topic.Title = Console.ReadLine().ToString(); Console.Write("Please enter Text:"); topic.Text = Console.ReadLine().ToString(); CommentDTO comment = new CommentDTO(); Console.Write("Please enter Comment:"); comment.CommentText = Console.ReadLine().ToString(); comment.UsersID = currentUser.IDUser; comment.CommentTime = DateTime.Now; commentDal.Add(comment); var comms = commentDal.Find(comment.CommentText); if (comms.Count == 0) { Console.WriteLine("error!"); } else { topic.CommentID = comms[0].ID; Console.WriteLine(topic.CommentID.ToString()); topicDal.Add(topic); } }