public static List<Tag> GetHotTag()
        {
            List<Tag> tagList = new List<Tag>();

            DataContextDataContext dc = new DataContextDataContext();
            ISingleResult<get_hot_tagResult> rs2 = dc.get_hot_tag();
            foreach (get_hot_tagResult r2 in rs2)
            {
                Tag tag = new Tag(r2.name, (int)r2.popularity);
                tagList.Add(tag);
            }
            return tagList;
        }