XML : XDocument parse method encoding values

I have below code snippet to read file containing xml string and convert it to the XDocument.

  public static XDocument ReadXmlContent(string xmlFilePath)          {              if (!string.IsNullOrEmpty(xmlFilePath))              {                  string content = File.ReadAllText(xmlFilePath);                                      XDocument xDoc = XDocument.Parse(content);                  return xDoc;              }              return null;          }    

This is doing my job well but with one issue. One of the node in xml string object is

  <billDescriptionValue>This is the charge in advance for your %quantity% Line isolating unit No. 1A at &#xA3;%quantity rate% per unit per month</billDescriptionValue>    

now, when i parse this using XDocument.Parse, the above content becomes

<billDescriptionValue>This is the charge in advance for your %quantity% Line isolating unit No. 1A at £%quantity rate% per unit per month</billDescriptionValue>

so why '& #xA3;' is changed to '£' ?? how can i stop this?

Thanks a lot in advance.