public MapDeviceLocationOptions()

{
    //Note: Run within a QueuedTask
    //Check there is a source first...
    if (DeviceLocationService.Instance.GetSource() == null)
        //Setting DeviceLocationOptions w/ no Device Location Source
        //Will throw an InvalidOperationException
        return;

    if (!MapDeviceLocationService.Instance.IsDeviceLocationEnabled)
        //Setting DeviceLocationOptions w/ no Device Location Enabled
        //Will throw an InvalidOperationException
        return;

    MapDeviceLocationService.Instance.SetDeviceLocationOptions(
      new MapDeviceLocationOptions()
      {
          DeviceLocationVisibility = true,
          NavigationMode = MappingDeviceLocationNavigationMode.KeepAtCenter,
          TrackUpNavigation = true
      });
}