public PurchaseService(IPurchaseRecordRepository purchaseRecordRepository)
{
if (purchaseRecordRepository == null)
{
throw new ArgumentNullException("purchaseRecordRepository");
}
_purchaseRecordRepository = purchaseRecordRepository;
}
public PurchaseService( IPurchaseRecordRepository purchaseRecordRepository )
{
if ( purchaseRecordRepository == null )
throw new ArgumentNullException( "purchaseRecordRepository" );
_purchaseRecordRepository = purchaseRecordRepository;
}