WriteElementsToXml method 
    
    
  
Writes the elements to XML.
The writer.
    
  Implementation
  @override
void WriteElementsToXml(EwsServiceXmlWriter writer) {
  writer.WriteStartElement(
      XmlNamespace.Messages, XmlElementNames.ParentItemId);
  writer.WriteAttributeValue(XmlAttributeNames.Id, this.ParentItemId);
  writer.WriteEndElement();
  writer.WriteStartElement(
      XmlNamespace.Messages, XmlElementNames.Attachments);
  for (Attachment? attachment in this.Attachments) {
    attachment!.WriteToXml(writer, attachment.GetXmlElementName());
  }
  writer.WriteEndElement();
}