Private Function GenerarXML(ByVal xmlStr As String, ByVal appendBuffer As String, ByRef strFileName As String) As String
        Dim xmlStrOriginal As String = xmlStr
        Dim xmlDoc As New XmlDocument
        Dim xnav As XPath.XPathNavigator
        Dim mngr As New XmlNamespaceManager(New NameTable)
        mngr.AddNamespace("ns", "http://www.dominio.com/Schemas/Documentos")
        Dim enc As XmlElement

        xmlDoc.LoadXml(xmlStr)
        enc = xmlDoc.SelectSingleNode("Nodo1/Nodo2/ns:nsNodo1/ns:nsNodo2", mngr)
        xmlDoc.LoadXml(enc.OuterXml)
        xnav = xmlDoc.CreateNavigator()
        Att1 = xnav.Evaluate("string(/*/@Att1)")
        Att2 = xnav.Evaluate("string(/*/@Att2)")

        Return xmlStr
    End Function