public IEnumerable<object> Render(PanelItem panelItem)
{
var dropdowntreeview = new DropDownTreeView
{
ID = panelItem.GetId(),
Enabled = false,
CssClass = "AdfPanelItem AdfTreeView",
Width = new Unit(panelItem.Width, UnitType.Ex),
Visible = panelItem.Visible
};
dropdowntreeview.AttachToolTip(panelItem);
panelItem.Target = dropdowntreeview;
return new List<Control> { dropdowntreeview, PanelValidator.Create(panelItem) };
}