void DefaultPins_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (DefaultPin pin in e.NewItems)
{
nMap.AddMarker(new MarkerOptions().SetPosition(pin.Position.toNativeLatLng()).SetTitle(pin.Title));
}
break;
case NotifyCollectionChangedAction.Remove:
//nMap.RemoveMarker();
break;
case NotifyCollectionChangedAction.Reset:
nMap.Markers.All((arg) => { nMap.RemoveMarker(arg); return(true); });
break;
}
}