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 - ) * PageSize)

                   .Take(PageSize)

                           select p;

                return list.ToList<Orders>();

            }

        }