public DmDonViHanhChinhCollection FetchAll()
 {
     DmDonViHanhChinhCollection coll = new DmDonViHanhChinhCollection();
     Query qry = new Query(DmDonViHanhChinh.Schema);
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }
 public DmDonViHanhChinhCollection FetchByQuery(Query qry)
 {
     DmDonViHanhChinhCollection coll = new DmDonViHanhChinhCollection();
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }