public TblNhanVienCollection FetchByQuery(Query qry)
        {
            TblNhanVienCollection coll = new TblNhanVienCollection();

            coll.LoadAndCloseReader(qry.ExecuteReader());
            return(coll);
        }
        public TblNhanVienCollection FetchAll()
        {
            TblNhanVienCollection coll = new TblNhanVienCollection();
            Query qry = new Query(TblNhanVien.Schema);

            coll.LoadAndCloseReader(qry.ExecuteReader());
            return(coll);
        }