Query XML document with Linq

using System;/*from  j  a  v  a2  s  .co m*/
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Linq;
using System.Reflection;
using System.Xml.Linq;
class Program {
    static void Main(string[] args) {
        XDocument xml = XDocument.Load(@"Employee.xml");
        var query = from p in xml.Elements("people").Elements("person")
                    where (int)p.Element("id") == 1
                    select p;
        foreach (var record in query) {
            Console.WriteLine("Employee: {0} {1}",
                                                record.Element("firstname").Value,
                                                record.Element("lastname").Value);
        }
    }
}