Xamarin.Forms.Labs select camera picture

Hello,

I'm using https://github.com/XLabs/Xamarin-Forms-Labs/wiki/Camera to take a picture and select it.

I can take a picture successfully and save it, but the problem is that the picture is saved in my application's directory("myAppName/Pictures") and the picture selector defaults in the device's default directory for camera pictures. So I can't select the pictures that I take from my application.

The code to select a picture is in my CameraPageViewModel:

private async Task SelectPicture()
        {
            Setup();

            ImageSource = null;
            try
            {
                var mediaFile = await _mediaPicker.SelectPhotoAsync(new CameraMediaStorageOptions
                    {
                        DefaultCamera = CameraDevice.Front,
                        MaxPixelDimension = 400,
                        Directory = "What goes here?"
                    });
                ImageSource = ImageSource.FromStream(() => mediaFile.Source);
            }
            catch (System.Exception ex)
            {
                Status = ex.Message;
            }
        }

I see that the CameraMediaStorageOptions has a "Directory" property which looks like what needs to be modified.
My question is: what value do I need to put in the Directory property so that the picture selector defaults in "myAppName/Pictures"?

Thanks!