Expensive Xpath Node Grabber

I use this, you shouldn’t.

public static string GetNodeValue2(XPathDocument sdoc, string sSelectExpression)  {
      string sRetVal = "";
// Read the XML document

       XPathNavigator myXPathNavigator = sdoc.CreateNavigator();

       XPathNodeIterator myXPathNodeIterator = 
                myXPathNavigator.Select(sSelectExpression);

        while (myXPathNodeIterator.MoveNext())

            {

                sRetVal = myXPathNodeIterator.Current.Value;

            }

            return sRetVal;

        }

Im so enterprisey with my xpath and shit.