private static ShippingRateComputationMethodCollection DBMapping(DBShippingRateComputationMethodCollection dbCollection) { if (dbCollection == null) { return(null); } ShippingRateComputationMethodCollection collection = new ShippingRateComputationMethodCollection(); foreach (DBShippingRateComputationMethod dbItem in dbCollection) { ShippingRateComputationMethod item = DBMapping(dbItem); collection.Add(item); } return(collection); }