Web Service via Data Access Object Pattern

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Xml;

namespace AndrewGolik.DaoTraining.DataAccessLayer.XmlRepository
{

    public class XmlDaoFactory:DaoFactory
    {
        public static string PathToCustomersFile
        {
      

           get{
       
                 string pathToFile = HttpContext.Current.Server.MapPath("App_Data/XmlRepository/Customers.xml");
                 if (!File.Exists(pathToFile))
                 {
                     XmlDocument xmlDoc = new XmlDocument();
                     xmlDoc.LoadXml("<Customers LastGeneratedId=\"0\" />");
                     xmlDoc.Save(pathToFile);

                 }
                 return pathToFile;
              
           }
       
        }
        public static string PathToOrdersFile 
        {
            get
            {

                string pathToFile = HttpContext.Current.Server.MapPath("App_Data/XmlRepository/Orders.xml");
                if (!File.Exists(pathToFile))
                {
                    XmlDocument xmlDoc = new XmlDocument();
                    xmlDoc.LoadXml("<Orders LastGeneratedId=\"0\" />");
                    xmlDoc.Save(pathToFile);

                }
                return pathToFile;

            }
        }
        public override  CustomerDao  GetCustomerDao()
        {


             return new XmlCustomerDao();
        }

        public override OrderDao GetOrderDao() 
        {

            return new XmlOrderDao();
        }

    }
}