OpenTween.Twitter.GetRelatedResult C# (CSharp) Method

        public async Task GetRelatedResult(bool read, RelatedPostsTabModel tab)
        {
            var targetPost = tab.TargetPost;
            var relPosts = new Dictionary<Int64, PostClass>();
            if (targetPost.TextFromApi.Contains("@") && targetPost.InReplyToStatusId == null)
            {
                //検索結果対応
                var p = TabInformations.GetInstance()[targetPost.StatusId];
                if (p != null && p.InReplyToStatusId != null)
                {
                    targetPost = p;
                }
                else
                {
                    p = await this.GetStatusApi(read, targetPost.StatusId)
                        .ConfigureAwait(false);
                    targetPost = p;
                }
            }
            relPosts.Add(targetPost.StatusId, targetPost);

            Exception lastException = null;

            // in_reply_to_status_id を使用してリプライチェインを辿る
            var nextPost = FindTopOfReplyChain(relPosts, targetPost.StatusId);
            var loopCount = 1;
            while (nextPost.InReplyToStatusId != null && loopCount++ <= 20)
            {
                var inReplyToId = nextPost.InReplyToStatusId.Value;

                var inReplyToPost = TabInformations.GetInstance()[inReplyToId];
                if (inReplyToPost == null)
                {
                    try
                    {
                        inReplyToPost = await this.GetStatusApi(read, inReplyToId)
                            .ConfigureAwait(false);
                    }
                    catch (WebApiException ex)
                    {
                        lastException = ex;
                        break;
                    }
                }

                relPosts.Add(inReplyToPost.StatusId, inReplyToPost);

                nextPost = FindTopOfReplyChain(relPosts, nextPost.StatusId);
            }

            //MRTとかに対応のためツイート内にあるツイートを指すURLを取り込む
            var text = targetPost.Text;
            var ma = Twitter.StatusUrlRegex.Matches(text).Cast<Match>()
                .Concat(Twitter.ThirdPartyStatusUrlRegex.Matches(text).Cast<Match>());
            foreach (var _match in ma)
            {
                Int64 _statusId;
                if (Int64.TryParse(_match.Groups["StatusId"].Value, out _statusId))
                {
                    if (relPosts.ContainsKey(_statusId))
                        continue;

                    var p = TabInformations.GetInstance()[_statusId];
                    if (p == null)
                    {
                        try
                        {
                            p = await this.GetStatusApi(read, _statusId)
                                .ConfigureAwait(false);
                        }
                        catch (WebApiException ex)
                        {
                            lastException = ex;
                            break;
                        }
                    }

                    if (p != null)
                        relPosts.Add(p.StatusId, p);
                }
            }

            relPosts.Values.ToList().ForEach(p =>
            {
                if (p.IsMe && !read && this._readOwnPost)
                    p.IsRead = true;
                else
                    p.IsRead = read;

                tab.AddPostQueue(p);
            });

            if (lastException != null)
                throw new WebApiException(lastException.Message, lastException);
        }