Need help in appending to Xml document

hello everyone,

I've been having a lot of difficulty in getting this to work. I've scoured the internet for a solution, but couldn't find any.

Here is my problem:

This is the XML document that I need to append to.

  <?xml version="1.0" encoding="utf-8"?>
 <Participants>
   <Participant>
     <Price>175000</Price>
     <Choice>Neither</Choice>
     <Choice>1</Choice>
     <Choice>Neither</Choice>
     <Municipality>NDG</Municipality>
     <HouseholdSize>4</HouseholdSize>
     <Gender>Female</Gender>
     <Age>55-64</Age>
     <Employment>student and employed</Employment>
     <Income>75000-99999</Income>
   </Participant>
   <Participant>
     <Price>225000</Price>
   </Participant>
 </Participants>

I need to append to the second Participant and I have the following code to do so.

 if(File.Exists("Information.xml") && PlayerPrefs.GetInt("Participant size")>1)
   {
  
  var tracker=PlayerPrefs.GetInt("Participant size");
         xmlRead.WhitespaceHandling=WhitespaceHandling.None;
         xmlRead.MoveToContent();
         xmlRead.Read();
     for(var i=1;i<tracker;i++)
     {
         xmlRead.Skip();
         xmlRead.Skip();
     }
   doc.Load(xmlRead);
   var elem =doc.CreateElement("Choice");
   elem.InnerText=Choice();
   doc.DocumentElement.AppendChild(elem);
 
    xmlRead.Close();
    doc.Save("Information.xml");
   

 }

However whenever it gets to Doc.Load it gives me the following error:

NullReferenceException: Unexpected node type EndElement. System.Xml.XmlDocument.ReadNodeCore (System.Xml.XmlReader reader) System.Xml.XmlDocument.ReadNode (System.Xml.XmlReader reader) System.Xml.XmlDocument.Load (System.Xml.XmlReader xmlReader) selectNeighborhood.OnGUI () (at Assets/scripts/GUI Scripts/selectNeighborhood.js:145)

Does anyone know why?

Additional info if needed:

xmlRead is defined as:

 var readerSettings = new XmlReaderSettings();
  readerSettings.IgnoreWhitespace = true;
  readerSettings.IgnoreComments = true;
 var xmlRead= XmlReader.Create("Information.xml",readerSettings);

Thanks guys and gals,