ICriteria crit = session.CreateCriteria();

                foreach (ICriteriaItem<object> param in filters)
                {
                    crit.Add(Expression.Eq(param.PropertyName, param.FilterValue));
                }

                crit.SetProjection(Projections.Distinct(Projections.ProjectionList()));

-- disctinct not working can you please help me

                crit.AddOrder(new Order(sortField, sortOrderAscending));

                crit.SetFirstResult(pageNumber * pageSize);

                crit.SetMaxResults(pageSize);

                transaction.Commit();

                return crit.List<IHCOSpendTable>();