AjaxControlToolkit.HtmlEditor.EditPanel.OnPreRender C# (CSharp) Метод

        protected override void OnPreRender(EventArgs e)
        {
            base.OnPreRender(e);
            ScriptManager.RegisterHiddenField(this, ContentChangedId, String.Empty);
            ScriptManager.RegisterHiddenField(this, ContentForceId, "1");
            ScriptManager.RegisterHiddenField(this, ContentId, Content.Replace("&", "&amp;").Replace("<", "&lt;").Replace(">", "&gt;").Replace("\"", "&quot;"));
            ScriptManager.RegisterHiddenField(this, ActiveModeId, ((int)ActiveMode).ToString(CultureInfo.InvariantCulture));
            Page.RegisterRequiresPostBack(this);

            for(var i = 0; i < Controls.Count; i++) {
                if(IgnoreTab) {
                    var panel = Controls[i] as ModePanel;
                    panel.Attributes.Add("tabindex", "-1");
                }
                if(Controls[i].GetType() == typeof(HtmlPanel)) {
                    (Controls[i] as HtmlPanel).CssClass = HtmlPanelCssClass;
                }
            }
        }