public IQueryable<T> FindList<T>(Expression<Func<T, bool>> whereLamdba, bool isAsc, Expression<Func<T, int>> orderLamdba) where T : class
        {
            var _list = nContext.Set<T>().Where(whereLamdba);
            if (isAsc) _list = _list.OrderBy(orderLamdba);
            else _list = _list.OrderByDescending(orderLamdba);

            return _list;
        }

public List<comment> CommentList(int type, int id)
        {
            var commentList = FindList<comment>(c => c.type == type && c.for_id == id, false, c => c.id).ToList();
            foreach (var item in commentList)
            {
                item.users = db.Find<users>(u => u.id == item.user_id);
            }
            return commentList;
        }