public void SerializeObject(string filename)
   {
      // Create an XmlSerializer instance.
      XmlSerializer NEWSER= CreateOverrider();

      // Create the object to serialize and set its properties.
      Group myGroup = new Group();
      myGroup.GroupName = "eMPLOYEES";
      myGroup.Comment = "SOME COMMENTS----;

      // Writing the file requires a TextWriter.
      TextWriter writer = new StreamWriter(filename);

      // Serialize the object and close the TextWriter.
      NEWSER.Serialize(writer, myGroup);
      writer.Close();
   }
}