public static IEnumerable <Point> ToPoints(this IEnumerable <Location> locations, MapView mapView)
{
return(locations.Select(location => mapView.LocationToViewportPoint(location)));
}
public static IEnumerable <Location> ToLocations(this IEnumerable <Point> points, MapView mapView)
{
return(points.Select <Point, Location>(point => mapView.ViewportPointToLocation(point)));
}