public DeviceLocationSource DeviceLocationSource {get;}

{
    DeviceLocationSourceChangedEvent.Subscribe(OnDeviceLocationSourceChanged);
    // Event handler for DeviceLocationSourceChanged event.
    void OnDeviceLocationSourceChanged(DeviceLocationSourceChangedEventArgs args)
    {
        if (args == null)
            return;

        var source = args.DeviceLocationSource;

        //  TODO - something with the updated source properties
    }
}