using System;
using System.IO;
using System.Xml;
public class Sample
{
public static void Main()
{
XmlTextReader txtreader = new XmlTextReader("attrs.xml");
XmlValidatingReader reader = new XmlValidatingReader(txtreader);
reader.MoveToContent();
string isbn = reader.GetAttribute("ISBN");
Console.WriteLine("The ISBN value: " + isbn);
reader.Close();
}
}