public CostingSummaryCollection FetchAll()
 {
     CostingSummaryCollection coll = new CostingSummaryCollection();
     Query qry = new Query(CostingSummary.Schema);
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }
 public CostingSummaryCollection FetchByQuery(Query qry)
 {
     CostingSummaryCollection coll = new CostingSummaryCollection();
     coll.LoadAndCloseReader(qry.ExecuteReader()); 
     return coll;
 }
 public CostingSummaryCollection FetchByID(object CostingId)
 {
     CostingSummaryCollection coll = new CostingSummaryCollection().Where("costing_Id", CostingId).Load();
     return coll;
 }