Read double value from XML

using System;/*from  ja v a 2  s.  c  o m*/
using System.Data;
using System.Text;
using System.Xml;

public class MainClass
{
    public static void Main()
    {
        XmlReader reader;
        double totalPrice=0;
        
        reader = XmlReader.Create("pubs.xml");
        while (reader.Read())
        {
            if (reader.IsStartElement() && reader.Name=="titles")
            {
                reader.MoveToAttribute("price");
                totalPrice += reader.ReadContentAsDouble();
            }
        }
    }
}