OpenTween.TweenMain.GoInReplyToPostTree C# (CSharp) Method

        private async Task GoInReplyToPostTree()
        {
            if (_curPost == null) return;

            TabModel curTabClass = _statuses.Tabs[_curTab.Text];

            if (curTabClass.TabType == MyCommon.TabUsageType.PublicSearch && _curPost.InReplyToStatusId == null && _curPost.TextFromApi.Contains("@"))
            {
                try
                {
                    var post = await tw.GetStatusApi(false, _curPost.StatusId);

                    _curPost.InReplyToStatusId = post.InReplyToStatusId;
                    _curPost.InReplyToUser = post.InReplyToUser;
                    _curPost.IsReply = post.IsReply;
                    this.PurgeListViewItemCache();
                    _curList.RedrawItems(_curItemIndex, _curItemIndex, false);
                }
                catch (WebApiException ex)
                {
                    this.StatusLabel.Text = $"Err:{ex.Message}(GetStatus)";
                }
            }

            if (!(this.ExistCurrentPost && _curPost.InReplyToUser != null && _curPost.InReplyToStatusId != null)) return;

            if (replyChains == null || (replyChains.Count > 0 && replyChains.Peek().InReplyToId != _curPost.StatusId))
            {
                replyChains = new Stack<ReplyChain>();
            }
            replyChains.Push(new ReplyChain(_curPost.StatusId, _curPost.InReplyToStatusId.Value, _curTab));

            int inReplyToIndex;
            string inReplyToTabName;
            long inReplyToId = _curPost.InReplyToStatusId.Value;
            string inReplyToUser = _curPost.InReplyToUser;
            //Dictionary<long, PostClass> curTabPosts = curTabClass.Posts;

            var inReplyToPosts = from tab in _statuses.Tabs.Values
                                 orderby tab != curTabClass
                                 from post in tab.Posts.Values
                                 where post.StatusId == inReplyToId
                                 let index = tab.IndexOf(post.StatusId)
                                 where index != -1
                                 select new {Tab = tab, Index = index};

            var inReplyPost = inReplyToPosts.FirstOrDefault();
            if (inReplyPost == null)
            {
                try
                {
                    await Task.Run(async () =>
                    {
                        var post = await tw.GetStatusApi(false, _curPost.InReplyToStatusId.Value)
                            .ConfigureAwait(false);
                        post.IsRead = true;

                        _statuses.AddPost(post);
                        _statuses.DistributePosts();
                    });
                }
                catch (WebApiException ex)
                {
                    this.StatusLabel.Text = $"Err:{ex.Message}(GetStatus)";
                    await this.OpenUriInBrowserAsync(MyCommon.GetStatusUrl(inReplyToUser, inReplyToId));
                    return;
                }

                this.RefreshTimeline();

                inReplyPost = inReplyToPosts.FirstOrDefault();
                if (inReplyPost == null)
                {
                    await this.OpenUriInBrowserAsync(MyCommon.GetStatusUrl(inReplyToUser, inReplyToId));
                    return;
                }
            }
            inReplyToTabName = inReplyPost.Tab.TabName;
            inReplyToIndex = inReplyPost.Index;

            TabPage tabPage = this.ListTab.TabPages.Cast<TabPage>().First((tp) => { return tp.Text == inReplyToTabName; });
            DetailsListView listView = (DetailsListView)tabPage.Tag;

            if (_curTab != tabPage)
            {
                this.ListTab.SelectTab(tabPage);
            }

            this.SelectListItem(listView, inReplyToIndex);
            listView.EnsureVisible(inReplyToIndex);
        }