public static void Serialize(XmlWriter writer, IGeoRSS georss)
        {
            XmlSerializerNamespaces namespaces = new XmlSerializerNamespaces();
            namespaces.Add(string.Empty, string.Empty);
            namespaces.Add("georss", "http://www.georss.org/georss");

            if (georss is GeoRss10Where) {
                namespaces.Add("gml", "http://www.opengis.net/gml");
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10Where));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10Point) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10Point));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10Line) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10Line));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10Polygon) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10Polygon));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10Box) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10Box));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10FeatureType) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10FeatureType));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10FeatureName) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10FeatureName));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10RelationshipTag) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10RelationshipTag));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10Elevation) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10Elevation));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }

            if (georss is GeoRss10Radius) {
                XmlSerializer geoRssSerializer = new XmlSerializer(typeof(GeoRss10Radius));
                geoRssSerializer.Serialize(writer,georss,namespaces);
            }
        }