protected override void OnDisappearing()
{
base.OnDisappearing();
mapView.RemoveBinding(TKCustomMap.CustomPinsProperty);
mapView.RemoveBinding(TKCustomMap.MapClickedCommandProperty);
mapView.RemoveBinding(TKCustomMap.MapLongPressCommandProperty);
mapView.RemoveBinding(TKCustomMap.MapCenterProperty);
mapView.RemoveBinding(TKCustomMap.PinSelectedCommandProperty);
mapView.RemoveBinding(TKCustomMap.SelectedPinProperty);
mapView.RemoveBinding(TKCustomMap.RoutesProperty);
mapView.RemoveBinding(TKCustomMap.PinDragEndCommandProperty);
mapView.RemoveBinding(TKCustomMap.CirclesProperty);
mapView.RemoveBinding(TKCustomMap.CalloutClickedCommandProperty);
mapView.RemoveBinding(TKCustomMap.PolylinesProperty);
mapView.RemoveBinding(TKCustomMap.PolygonsProperty);
mapView.RemoveBinding(TKCustomMap.MapRegionProperty);
mapView.RemoveBinding(TKCustomMap.RouteClickedCommandProperty);
mapView.RemoveBinding(TKCustomMap.RouteCalculationFinishedCommandProperty);
mapView.RemoveBinding(TKCustomMap.TilesUrlOptionsProperty);
mapView.RemoveBinding(TKCustomMap.MapFunctionsProperty);
}
