public async Task <bool> DeleteCommentAsync(int id)
        {
            var newsComments = NewsComments.Where(n => n.CommentID == id).FirstOrDefault();
            var result       = await StoreManager.NewsDetailsService.DeleteCommentAsync(newsComments.CommentID);

            if (result.Success)
            {
                var index = NewsComments.IndexOf(newsComments);
                NewsComments.RemoveAt(index);
                if (NewsComments.Count == 0)
                {
                    LoadStatus = LoadMoreStatus.StausNodata;
                }
                NewsDetails.CommentDisplay = (news.CommentCount = news.CommentCount - 1).ToString();
            }
            else
            {
                Crashes.TrackError(new Exception()
                {
                    Source = result.Message
                });
                Toast.SendToast("删除失败");
            }
            return(result.Success);
        }
        public void AddComment(NewsComments comment)
        {
            var book = NewsComments.Where(b => b.CommentID == comment.CommentID).FirstOrDefault();

            if (book == null)
            {
                NewsComments.Add(comment);
                NewsDetails.CommentDisplay = (news.CommentCount = news.CommentCount + 1).ToString();
            }
            else
            {
                var index = NewsComments.IndexOf(book);
                NewsComments[index] = comment;
            }
            if (LoadStatus == LoadMoreStatus.StausNodata)
            {
                LoadStatus = LoadMoreStatus.StausEnd;
            }
        }