private void AddOverlays()
{
var circle = MKCircle.Circle(AtlantaCoords, 100 * METERS_IN_A_MILE);
MyMapView.AddOverlay(circle);
var poly = MKPolygon.FromCoordinates(new CLLocationCoordinate2D[]
{
new CLLocationCoordinate2D(25.25, -80.27),
new CLLocationCoordinate2D(32.14, -64.97),
new CLLocationCoordinate2D(18.23, -66.56)
});
MyMapView.AddOverlay(poly);
}