Mini Kabibi Habibi

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Activation;
using System.Collections.ObjectModel;
using System.Xml;
using System.Web;

namespace DevExpress.MailClient.DataService {
    [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class ContactsService : IContactsService {
        public ObservableCollection<ServerContact> GetContacts() {
            XmlDocument doc = new XmlDocument();
            ObservableCollection<ServerContact> contacts = new ObservableCollection<ServerContact>();
            doc.Load(HttpContext.Current.Server.MapPath("~/App_Data/VideoRent.xml"));
            XmlNodeList customers = doc.GetElementsByTagName("Customer");
            XmlNodeList names = doc.GetElementsByTagName("Person");
            ServerContact contact = null;
            foreach(XmlNode customer in customers) {
                contact = new ServerContact();
                contact.MiddleName = customer["MiddleName"].InnerText;
                contact.Email = customer["Email"].ChildNodes[0].Value;
                contact.Email = contact.Email.Replace("dxvideorent.com", "dxmail.net");
                contact.Address = customer["Address"].ChildNodes[0].Value;
                contact.Phone = customer["Phone"].ChildNodes[0].Value;
                if(customer["Photo"] != null)
                    contact.Photo = Convert.FromBase64String(customer["Photo"].ChildNodes[0].Value);

                FillPersonInformation(contact, names, customer["Oid"].ChildNodes[0].Value);
                contacts.Add(contact);
            }
            return contacts;
        }

        void FillPersonInformation(ServerContact contact, XmlNodeList names, string id) {
            foreach(XmlNode customer in names) {
                if(customer["Oid"].ChildNodes[0].Value == id) {
                    contact.FirstName = customer["FirstName"].ChildNodes[0].Value;
                    contact.LastName = customer["LastName"].ChildNodes[0].Value;
                    contact.Gender = customer["Gender"].ChildNodes[0].Value;
                    contact.BirthDate = customer["BirthDate"].ChildNodes[0].Value;
                }
            }
        }
    }
}