public static GeoRssWhere ToGeoRssWhere(this MultiLineString mlinestring) { if (mlinestring.LineStrings.Count() > 1) { return(new GeoRssWhere() { Item = new MultiLineStringType[] { mlinestring.ToGmlMultiLineString() }, Type = "multilinestring" }); } else { return(new GeoRssWhere() { Item = new LineStringType[] { mlinestring.LineStrings.First().ToGmlLineString() } }); } }