public ActionResult Add()
{
ViewBag.Title = PresentationModel.GetViewTitleForTenant("Manage Search", this.Session.GetTenant());
List<SearchAttributeViewModel> searchAttributeList = (List<SearchAttributeViewModel>)Session["searchAttributeList"];
SearchAttributeViewModel sa = new SearchAttributeViewModel();
sa.id = searchAttributeList.Count;
ViewData["windowVisible"] = true;
ViewData["selectedSearchAttribute"] = sa;
return View("SearchDesigner", (List<SearchAttributeViewModel>)Session["searchAttributeList"]);
}