using System;

using System.Xml;

public class Program

{

    public static void Main()

    {

        XmlDocument xmlDoc = new XmlDocument();

        xmlDoc.LoadXml(@"<plan-elements xsi:type="command-element" target="audio/MNT" command="<?xml version="1.0" encoding="UTF-8"?>

<java version="1.6.0_25" class="java.beans.XMLDecoder"> 

 <object class="com.transdyn.dynac.audio.command.StopAudioPlayCommand"> 

  <void property="commandOwner"> 

   <object class="com.transdyn.dynac.command.CommandOwner"> 

    <void property="facilityCode"> 

     <string>ED</string> 

    </void> 

    <void property="userName"> 

     <string>lbrownhill</string> 

    </void> 

    <void property="workstationName"> 

     <string>OPWS1</string> 

    </void> 

   </object> 

  </void> 

  <void property="id"> 

   <object class="java.util.UUID"> 

    <long>-2901034733381005651</long> 

    <long>-5070573165997691215</long> 

   </object> 

  </void> 

 </object> 

</java>");

​

        XmlNode nonFuel = xmlDoc.SelectSingleNode("//target="audio/MNT");

        XmlNode dispute = xmlDoc.SelectSingleNode("//Dispute");

​

​

        XmlNode xmlRecordNo=  xmlDoc.CreateNode(XmlNodeType.Element, "Records", null);

        xmlRecordNo.InnerText = Guid.NewGuid().ToString();

        nonFuel.InsertAfter(xmlRecordNo, dispute);

        Console.WriteLine(xmlDoc.InnerXml);

    }

}