public async Task <bool> DeleteQuestionAnswersAsync(int id)
        {
            var questionsAnswers = QuestionsAnswers.Where(n => n.AnswerID == id).FirstOrDefault();
            var result           = await StoreManager.QuestionsDetailsService.DeleteAnswerAsync(questionsAnswers.Qid, questionsAnswers.AnswerID);

            if (result.Success)
            {
                var index = QuestionsAnswers.IndexOf(questionsAnswers);
                QuestionsAnswers.RemoveAt(index);
                if (QuestionsAnswers.Count == 0)
                {
                    LoadStatus = LoadMoreStatus.StausNodata;
                }
                QuestionsDetails.CommentDisplay = (questions.AnswerCount = questions.AnswerCount - 1).ToString();
            }
            else
            {
                Crashes.TrackError(new Exception()
                {
                    Source = result.Message
                });
                Toast.SendToast("删除失败");
            }
            return(result.Success);
        }
        public void EditComment(QuestionsAnswers comment)
        {
            var book = QuestionsAnswers.Where(b => b.AnswerID == comment.AnswerID).FirstOrDefault();

            if (book == null)
            {
                QuestionsAnswers.Add(comment);
                QuestionsDetails.CommentDisplay = (questions.AnswerCount + 1).ToString();
            }
            else
            {
                var index = QuestionsAnswers.IndexOf(book);
                QuestionsAnswers[index] = comment;
            }
            if (LoadStatus == LoadMoreStatus.StausNodata)
            {
                LoadStatus = LoadMoreStatus.StausEnd;
            }
        }