using System;

using System.Linq;

using System.Xml;

using System.Xml.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

​

string xml = @"<?xml version=""1.0""?>

<PurchaseOrders>

  <PurchaseOrder PurchaseOrderNumber=""99503"" OrderDate=""1999-10-20"">

    <Address Type=""Shipping"">

      <Name>Ellen Adams</Name>

      <Street>123 Maple Street</Street>

      <City>Mill Valley</City>

      <State>CA</State>

      <Zip>10999</Zip>

      <Country>USA</Country>

    </Address>

    <Address Type=""Billing"">

      <Name>Tai Yee</Name>

      <Street>8 Oak Avenue</Street>

      <City>Old Town</City>

      <State>PA</State>

      <Zip>95819</Zip>

      <Country>USA</Country>

    </Address>

  </PurchaseOrder>

</PurchaseOrders>";

    XDocument xdoc = XDocument.Parse(xml);

    var orders = 

        (from e in xdoc.Root.Elements("PurchaseOrder")

         select new { 

             Number = (string)e.Attribute("PurchaseOrderNumber"),

             Date = (string)e.Attribute("OrderDate"),

             Shipping = e.Elements("Address").Where(a => (string)a.Attribute("Type") == "Shipping").Select(a => new { Name = (string)a.Element("Name") }).FirstOrDefault(),

             Billing = e.Elements("Address").Where(a => (string)a.Attribute("Type") == "Billing").Select(a => new { Name = (string)a.Element("Name") }).FirstOrDefault()

         }).ToList();

    foreach (var e in orders)

    Console.WriteLine(e);

    }

}