internal void AddTabTitleDOMElement(HtmlElement tabTitle) { _elmTabTitleContainer.AppendChild(tabTitle); _tabCount++; if (_tabCount == 1) { Utility.EnsureCSSClassOnElement(_elmTabTitleContainer, "ms-cui-oneCtxTab"); } else if (_tabCount == 2) { Utility.RemoveCSSClassFromElement(_elmTabTitleContainer, "ms-cui-oneCtxTab"); } }