public ActionResult Index(string lang, string group)
        {
            ViewBag.MessageRed    = TempData["MessageRed"];
            ViewBag.MessageYellow = TempData["MessageYellow"];
            ViewBag.MessageGreen  = TempData["MessageGreen"];

            if (string.IsNullOrEmpty(lang))
            {
                lang = SF.GetLangCodeThreading();
            }
            ViewBag.Lang = lang;

            if (string.IsNullOrEmpty(group))
            {
                group = SF.GetFirstMenuGroup();
            }
            ViewBag.Group = group;

            var menuItems = _db.Menus.Where(x => x.Group == group && x.LangCode == lang).OrderBy(x => x.DisplayOrder).AsNoTracking().ToList();
            var model     = menuItems.Where(x => x.ParentID == 0).ToList();

            model.ForEach(x =>
            {
                x.Childrens = GetChildrens(x.ID, menuItems);//.Where(m => m.ParentID == x.ID).ToList();
            });
            return(View(model));
        }