using System;

using System.Xml.Linq;

using System.Linq;

using System.Text;

using System.Threading;

using System.Xml.Serialization;

using System.Xml.XPath;

public class Program

{

    public static void Main()

    {

        var xmlIn = @"<Container xmlns:i='http://www.w3.org/2001/XMLSchema-instance' xmlns='DM'>

<IsConsigned>false</IsConsigned>

<LockState>Unlocked</LockState>

<SourceType i:nil='true' />

<Id>04216194-4f62-47ee-ab21-c1053d01bf1e</Id>

<Owner>IN</Owner>

<Created>2012-08-21T09:29:10.528321+02:00</Created>

</Container>";

        var xml = XDocument.Parse(xmlIn);

        XNamespace d = "DM";

        string test = xml.Root.Element(d+"Owner").Value;

        Console.WriteLine(test);

        string id = xml.Root.Element(d+"Id").Value;

        Console.WriteLine(id);

    }

}