public GPX10File(string filename)
        {
            try
            {
                _filename = filename;
                _gpx10 = DeserializeGPX();
                _gpxFileDetails = new GPX10FileDetails(_gpx10);

                _routes = GetRoutes();
                _tracks = GetTracks();
                _waypoints = GetWayPoints();
            }
            catch (Exception)
            {
                _isFileValid = false;
            }
        }
 public GPX10FileDetails(gpx gpx10)
 {
     _gpxType = gpx10;
 }