public PriceOrderLogCollection FetchAll()
 {
     PriceOrderLogCollection coll = new PriceOrderLogCollection();
     Query qry = new Query(PriceOrderLog.Schema);
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }
 public PriceOrderLogCollection FetchByQuery(Query qry)
 {
     PriceOrderLogCollection coll = new PriceOrderLogCollection();
     coll.LoadAndCloseReader(qry.ExecuteReader()); 
     return coll;
 }
 public PriceOrderLogCollection FetchByID(object PoLogId)
 {
     PriceOrderLogCollection coll = new PriceOrderLogCollection().Where("po_log_id", PoLogId).Load();
     return coll;
 }