how to read xml child nod using Xpath

using System;
using System.IO;
using System.Xml.XPath;
namespace Sandbox
{
    class Program
    {
        static void Main(string[] args)
        {
            string xml = "<package><workflowprocesses><workflowprocess></workflowprocess><workflowprocess><activites><activity><version>1.0.0.0</version></activity></activites></workflowprocess></workflowprocesses></package>";

            XPathDocument document = new XPathDocument(new StringReader(xml));
            XPathNavigator navigator = document.CreateNavigator();
            XPathNodeIterator versionList = navigator.Select("/package/workflowprocesses/workflowprocess/activites/activity/version");
            foreach (XPathNavigator versionElement in versionList)
            {
                string version = versionElement.Value;
                Console.WriteLine("Version=[{0}]", version);
            }
        }
    }
}