public DalRis.FacOrdenCollection FacOrdenRecords() { if (colFacOrdenRecords == null) { colFacOrdenRecords = new DalRis.FacOrdenCollection().Where(FacOrden.Columns.IdPrefactura, IdPreFactura).Load(); colFacOrdenRecords.ListChanged += new ListChangedEventHandler(colFacOrdenRecords_ListChanged); } return(colFacOrdenRecords); }