public override int GetHashCode()
        {
            unchecked
            {
                var hashCode = Billing != null?Billing.GetHashCode() : 0;

                hashCode = (hashCode * 397) ^ (CartHash != null ? CartHash.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (CartTax != null ? CartTax.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (CreatedVia != null ? CreatedVia.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (Currency != null ? Currency.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ CustomerId;
                hashCode = (hashCode * 397) ^ (CustomerIpAddress != null ? CustomerIpAddress.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (CustomerNote != null ? CustomerNote.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (CustomerUserAgent != null ? CustomerUserAgent.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (DiscountTax != null ? DiscountTax.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (DiscountTotal != null ? DiscountTotal.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ Id;
                hashCode = (hashCode * 397) ^ (Number != null ? Number.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (OrderKey != null ? OrderKey.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ ParentId;
                hashCode = (hashCode * 397) ^ (PaymentMethod != null ? PaymentMethod.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (PaymentMethodTitle != null ? PaymentMethodTitle.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ PricesIncludeTax.GetHashCode();
                hashCode = (hashCode * 397) ^ (Shipping != null ? Shipping.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (ShippingTax != null ? ShippingTax.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (ShippingTotal != null ? ShippingTotal.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (Status != null ? Status.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (Total != null ? Total.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (TotalTax != null ? TotalTax.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (TransactionId != null ? TransactionId.GetHashCode() : 0);
                hashCode = (hashCode * 397) ^ (Version != null ? Version.GetHashCode() : 0);
                return(hashCode);
            }
        }
        public override int GetHashCode()
        {
            //Get hash code for the Name field if it is not null.
            int hashProductName = OrderKey == null ? 0 : OrderKey.GetHashCode();

            //Get hash code for the Code field.
            int hashProductCode = DeliveryOrder.GetHashCode();

            //Calculate the hash code for the product.
            return(hashProductName ^ hashProductCode);
        }