XDocument Determine Last Child of Parent
===

Walking an XML document with XDocument using descendants how would I determine I am at the last child of the parent?

    XDocument xmlDoc = XDocument.Parse(xml)

      foreach (var element in xmlDoc.Descendants())
            {
               //Need to determine the last child of the parent and do something here. 
            }

Example of XML and what is expected to be returned.  I need to dynamically walk the document and not specify the XPath or Xquery since these will be used generically for various XML documents without getting into a lot of details of the why... Just looking to see if I can do this with XDocument or if there is a better approach still not specifying the tag names in a XPath or XQuery unless it can be done dynamically without knowing how many levels deep the document may be., 
     
    <?xml version="1.0"?>
    <Root> 
    <Customer>
    <CustID>1</CustID>
    <Name>Smith, Joe</Name>
    <CustomerTransDetail>
    <CustID>1</CustID>
    <CustTransID>1</CustTransID>
    <Note>NA</Note>
    </CustomerTransDetail>
    <CustomerTransDetail>
    <CustID>1</CustID>
    <CustTransID>2</CustTransID>
    <Note>N/A</Note>
    </CustomerTransDetail>
    </Customer>
    <Customer>
    <CustID>2</CustID>
    <Name>Smith, Jane</Name>
    <CustomerTransDetail>
    <CustID>2</CustID>
    <CustTransID>1</CustTransID>
    <Note>N/A</Note>
    </CustomerTransDetail>
    <CustomerTransDetail>
    <CustID>2</CustID>
    <CustTransID>2</CustTransID>
    <Note>N/A</Note>
    </CustomerTransDetail>
    </Customer>
    </Root>

I need to know when I hit the last child of the parent so I can do something.  So every time I hit Name node or Note node for example I can do something. 