Serialisering af XML i C#

using System;
using System.IO;
using System.Xml.Serialization;

namespace E
{
    [XmlRoot("paymentService")]
    public class PaymentService
    {
        [XmlAttribute]
        public string merchantCode { get; set; }
        [XmlElement]
        public Reply reply { get; set; }
    }
    public class Reply
    {
        public OrderStatus orderStatus { get; set; }
    }
    public class OrderStatus
    {
        [XmlAttribute]
        public string orderCode { get; set; }
        [XmlElement]
        public Reference reference { get; set; }
    }
    public class Reference
    {
        [XmlAttribute]
        public int id { get; set; }
        [XmlText]
        public string Text { get; set; }
    }
    public class Program
    {
        public static void Main(string[] args)
        {
            string xmlstr = @"<?xml version='1.0' encoding='UTF-8'?>
<paymentService version='1.4' merchantCode='DANFREUR'>
    <reply>
        <orderStatus orderCode='2c00286484c743'>
            <reference id='3054233'>
                https://payments-est.worldpay.com/a47299817475202gGF_yXIZpho134rLgPcK2w
            </reference>
        </orderStatus>
    </reply>
</paymentService>";
            XmlSerializer ser = new XmlSerializer(typeof(PaymentService));
            PaymentService o = (PaymentService)ser.Deserialize(new StringReader(xmlstr));
            Console.WriteLine(o.merchantCode);
            Console.WriteLine(o.reply.orderStatus.orderCode);
            Console.WriteLine(o.reply.orderStatus.reference.id);
            Console.WriteLine(o.reply.orderStatus.reference.Text);
            Console.ReadKey();
        }
    }
}