/// <summary>
        /// 新增商品分类
        /// </summary>
        /// <param name="access_token"></param>
        /// <param name="classid"></param>
        /// <returns></returns>
        public static string vdian_shop_cate_add(string access_token, Class c)
        {
            List <cates> calist = new List <cates>();

            calist.Add(new cates()
            {
                cate_name = c.Title,
                sort_num  = c.Sort
            });
            @public       p   = new @public("vdian.shop.cate.add", access_token);
            StringBuilder str = new StringBuilder();

            str.Append("{");
            str.Append("\"cates\":" + JsonHelper.SerializeObject(calist));
            str.Append("}&public=");
            str.Append(JsonHelper.SerializeObject(p));
            return(str.ToString());
        }
 var(@public, @private) = keyPaths;