get last node from xml

See more:

C#

i had xml like this
i want to get last shipmentevent node details using namespacemanager

<?xml version="1.0" encoding="UTF-8"?>
<req:TrackingResponse xmlns:req="http://someurl" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://someurl TrackingResponse.xsd">

<AWBInfo>
    <AWBNumber>1234567895</AWBNumber>
    <Status>
      <ActionStatus>success</ActionStatus>
    </Status>
    <ShipmentInfo>
      <OriginServiceArea/>
      <DestinationServiceArea/>
      <ShipperName/>
      <ConsigneeName/>
      <ShipmentDate/>
      <DlvyNotificationFlag>N</DlvyNotificationFlag>
      <ShipmentEvent>
        <Date>2015-02-19</Date>
        <Time>15:21:00</Time>
        <ServiceEvent>
          <EventCode>CC</EventCode>
          <Description>Awaiting collection by recipient as requested</Description>
        </ServiceEvent>
        <Signatory/>
        <ServiceArea>
          <ServiceAreaCode>MAD</ServiceAreaCode>
          <Description>MADRID - SPAIN</Description>
        </ServiceArea>
      </ShipmentEvent>
      <ShipmentEvent>
        <Date>2015-02-19</Date>
        <Time>15:26:00</Time>
        <ServiceEvent>
          <EventCode>OK</EventCode>
          <Description>Delivered - Signed for by</Description>
        </ServiceEvent>
        <Signatory>MANUEL</Signatory>
        <ServiceArea>
          <ServiceAreaCode>MAD</ServiceAreaCode>
          <Description>MADRID - SPAIN</Description>
        </ServiceArea>
      </ShipmentEvent>
    </ShipmentInfo>
  </AWBInfo>

iam using code like this

shipmenteventdate = xmlDoc.SelectSingleNode("req:TrackingResponse/AWBInfo/ShipmentInfo/ShipmentEvent/Date", namespaceManager).InnerText;

but iam getting first shipmentevent node details i want last shipmentevent node details

Thanks