public List<string> LoadGPXTracks(string sFile)
        {
            XDocument gpxDoc = GetGpxDoc(sFile);
            XNamespace gpx = GetGpxNameSpace();
            var tracks = from track in gpxDoc.Descendants(gpx + "trk")
                         select new
                         {
                             Name = track.Element(gpx + "name") != null ?
                                track.Element(gpx + "name").Value : null,
                             Segs = (
                                 from trackpoint in track.Descendants(gpx + "trkpt")
                                 select new
                                 {
                                     Latitude = trackpoint.Attribute("lat").Value,
                                     Longitude = trackpoint.Attribute("lon").Value,
                                     Elevation = trackpoint.Element(gpx + "ele") != null ?
                                        trackpoint.Element(gpx + "ele").Value : null,
                                     Time = trackpoint.Element(gpx + "time") != null ?
                                        trackpoint.Element(gpx + "time").Value : null
                                 }
                             )
                         };

           // StringBuilder sb = new StringBuilder();
           List<string> stringList = new List<string>();

            foreach (var trk in tracks)
            {
                stringList.Add(trk);
                // Populate track data objects.
                foreach (var trkSeg in trk.Segs)
                {
                    // Populate detailed track segments
                    // in the object model here.
                    /*sb.Append(
                       string.Format("Track:{0} - Latitude:{1} Longitude:{2} " +
                       "Elevation:{3} Date:{4}\n",
                       trk.Name, trkSeg.Latitude,
                       trkSeg.Longitude, trkSeg.Elevation,
                       trkSeg.Time));
                       */

                   /* stringList.Add(trkSeg.Latitude);
                    stringList.Add(trkSeg.Longitude);
                    stringList.Add(trkSeg.Elevation);
                    */
                }
            }

            return stringList;
        }