public ActionResult Add()
        {
            var pagesTree = new List <PageTree>
            {
                new PageTree("Đề nghị hỗ trợ hội nghị", "/ConferenceSponsor"),
                new PageTree("Thêm", "/ConferenceSponsor/Add"),
            };
            string      output = AppRepos.GetAddPageJson(LanguageResource.GetCurrentLanguageName());
            DataAddPage data   = JsonConvert.DeserializeObject <DataAddPage>(output);

            ViewBag.data      = data;
            ViewBag.pagesTree = pagesTree;
            return(View());
        }