public MapDeviceLocationOptions()

//Must be on the QueuedTask.Run()

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

var map = MapView.Active.Map;
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
  });