OpenTween.TweenMain.DoRefreshMore C# (CSharp) Method

        private async Task DoRefreshMore()
        {
            //ページ指定をマイナス1に
            if (_curTab != null)
            {
                TabModel tab;
                if (!this._statuses.Tabs.TryGetValue(this._curTab.Text, out tab))
                    return;

                switch (_statuses.Tabs[_curTab.Text].TabType)
                {
                    case MyCommon.TabUsageType.Mentions:
                        await this.GetReplyAsync(loadMore: true);
                        break;
                    case MyCommon.TabUsageType.DirectMessage:
                        await this.GetDirectMessagesAsync(loadMore: true);
                        break;
                    case MyCommon.TabUsageType.Favorites:
                        await this.GetFavoritesAsync(loadMore: true);
                        break;
                    case MyCommon.TabUsageType.Profile:
                        //// TODO
                        break;
                    case MyCommon.TabUsageType.PublicSearch:
                        var searchTab = (PublicSearchTabModel)tab;
                        if (string.IsNullOrEmpty(searchTab.SearchWords)) return;
                        await this.GetPublicSearchAsync(searchTab, loadMore: true);
                        break;
                    case MyCommon.TabUsageType.UserTimeline:
                        await this.GetUserTimelineAsync((UserTimelineTabModel)tab, loadMore: true);
                        break;
                    case MyCommon.TabUsageType.Lists:
                        var listTab = (ListTimelineTabModel)tab;
                        if (listTab.ListInfo == null || listTab.ListInfo.Id == 0) return;
                        await this.GetListTimelineAsync(listTab, loadMore: true);
                        break;
                    default:
                        await this.GetHomeTimelineAsync(loadMore: true);
                        break;
                }
            }
            else
            {
                await this.GetHomeTimelineAsync(loadMore: true);
            }
        }