Hi this my xml file,

<?xml version="1.0"?>
<worldpatentdata xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <meta name="elapsed-time" value="329" xmlns="http://ops.epo.org"/>
  <exchange-documents xmlns="http://www.epo.org/exchange">
    <exchange-document country="AT" doc-number="380509" family-id="38826527" kind="T" system="ops.epo.org">
      <bibliographic-data>
        <publication-reference data-format="docdb">
          <document-id>
            <country>AT</country>
            <doc-number>380509</doc-number>
            <kind>T</kind>
            <date>20071215</date>
          </document-id>
        </publication-reference>  
        <parties>
          <applicants>
          </applicants>
          <inventors>
          </inventors>
        </parties>
      </bibliographic-data>
    </exchange-document>
  </exchange-documents>
</worldpatentdata>

For the above xml file, i need the xpath to receive the childnodes below it:

Output i need is :

<exchange-documents xmlns="http://www.epo.org/exchange">
    <exchange-document country="AT" doc-number="380509" family-id="38826527" kind="T" system="ops.epo.org">
      <bibliographic-data>
        <publication-reference data-format="docdb">
          <document-id>
            <country>AT</country>
            <doc-number>380509</doc-number>
            <kind>T</kind>
            <date>20071215</date>
          </document-id>
        </publication-reference>  
        <parties>
          <applicants>
          </applicants>
          <inventors>
          </inventors>
        </parties>
      </bibliographic-data>
    </exchange-document>

I using Linq-Xml to get the following data:

This is my Xpath and code:

var list = doc1.XPathSelectElement("exchange-document");

I couldnt retreive the needed output.It returns null for the above code. Can anyone pls help on this by providing the correct xpath to retieve the child nodes. Else is there any other way to retrieve it.