private static void WriteContactInfo(XmlWriter writer, ContactInfo contactInfo)
{
if (contactInfo == null)
return;
writer.WriteXmlAttribute("D", contactInfo.AddressLine1);
writer.WriteXmlAttribute("E", contactInfo.PoBoxNumber);
writer.WriteXmlAttribute("F", contactInfo.PostalCode);
writer.WriteXmlAttribute("G", contactInfo.City);
writer.WriteXmlAttribute("H", contactInfo.StateOrProvince);
writer.WriteXmlAttribute("I", contactInfo.Country);
WriteContacts(writer, contactInfo.Contacts);
}