OpenTween.TweenMain.UnreadStripMenuItem_Click C# (CSharp) Method

        private void UnreadStripMenuItem_Click(object sender, EventArgs e)
        {
            using (ControlTransaction.Update(this._curList))
            {
                foreach (int idx in _curList.SelectedIndices)
                {
                    var post = this._statuses.Tabs[this._curTab.Text][idx];
                    this._statuses.SetReadAllTab(post.StatusId, read: false);
                    ChangeCacheStyleRead(false, idx);
                }
                ColorizeList();
            }
            foreach (TabPage tb in ListTab.TabPages)
            {
                if (_statuses.Tabs[tb.Text].UnreadCount > 0)
                {
                    if (this._cfgCommon.TabIconDisp)
                    {
                        if (tb.ImageIndex == -1) tb.ImageIndex = 0; //タブアイコン
                    }
                }
            }
            if (!this._cfgCommon.TabIconDisp) ListTab.Refresh();
        }