public IList<Orders> GetUserOrderByUserID(string userid, int PageIndex, int PageSize, out long count)        {            using (ISession _session = base.GetSession())            {                var hql = "select count(*) from Orders where userid=:userid";                IQuery query = _session.CreateQuery(hql);                query.SetString("userid", userid);                object obj = query.UniqueResult();                long.TryParse(obj.ToString(), out count);                var list = from p in _session.Linq<Orders>()                   .Where(p => p.UserID == userid)                   .OrderByDescending(p => p.Otime)                   .Skip((PageIndex - 1) * PageSize)                   .Take(PageSize)                           select p;                return list.ToList<Orders>();            }        }