Basic position changed event handler

PositionChanged.cs

private async void PositionChangedHandler(Geolocator sender, PositionChangedEventArgs args)
{
    if (args.Position == null || args.Position.Coordinate == null) return;

    //save updated coordinates to a property on the class
    //can do whatever we want with position, all I need are the coordinates
    Position = args.Position.Coordinate;

    //stop the tracking once we have our desired accuracy in meters
    if (args.Position.Coordinate.Accuracy < 500)
    {
        // this implicitly stops the tracking operation
        _geolocator.PositionChanged -= PositionChangedHandler;
        
        //could raise an event here to let the UI thread know we have a position
        //of the desired accuracy at this point.
    }
}