OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
        {
            PhotoViewHolder vh = holder as PhotoViewHolder;

            // Set the ImageView and TextView in this ViewHolder's CardView
            // from this position in the photo album:
            vh.Image.SetImageResource(mPhotoAlbum[position].PhotoID);
            vh.Caption.Text = mPhotoAlbum[position].Caption;
        }
        OnCreateViewHolder(ViewGroup parent, int viewType)
        {
            // Inflate the CardView for the photo:
            View itemView = LayoutInflater.From(parent.Context).
                            Inflate(Resource.Layout.PhotoCardView, parent, false);

            // Create a ViewHolder to find and hold these view references, and
            // register OnClick with the view holder:
            PhotoViewHolder vh = new PhotoViewHolder(itemView, OnClick);

            return(vh);
        }