public string Add(string key, string content) { string mess = ""; string temp = HttpContext.Current.Server.HtmlEncode(content); Language_content languagecontent = new Language_content(); languagecontent.SetFile(HttpContext.Current.Session["namePath_file_language_content"].ToString()); mess = languagecontent.InsertRecord(key, temp); ResetLanguageShow(); if (mess.Equals("")) { HttpContext.Current.Application[HttpContext.Current.Session["namePath_file_language_content"].ToString()] = null; if (!SetApp()) { Response.Redirect("Default.aspx?menu=lang"); } } else if (mess.Equals("FileNoEixts")) { mess = "File ngôn ngữ đã bị xóa. Không thể thêm mới nội dung."; HttpContext.Current.Session["language_content_dynamic"] = null; HttpContext.Current.Application[HttpContext.Current.Session["namePath_file_language_content"].ToString()] = null; } return mess; }