/*
         * Writes all data to a xml file.
         */
        private string ToXml(DisplayFlight display)
        {
            //Initiate XML stuff
            StringBuilder     sb       = new StringBuilder();
            XmlWriterSettings settings = new XmlWriterSettings();
            XmlWriter         writer   = XmlWriter.Create(sb, settings);

            writer.WriteStartDocument();
            writer.WriteStartElement("Displays");

            display.ToXml(writer);

            writer.WriteEndElement();
            writer.WriteEndDocument();
            writer.Flush();
            return(sb.ToString());
        }