public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
        {
            View itemView = LayoutInflater.From(parent.Context).
                            Inflate(Resource.Layout.ArticleCardView, parent, false);

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

            return(vh);
        }
        public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
        {
            ArticleViewHolder vh = holder as ArticleViewHolder;

            // Set the TextViews in this ViewHolder's CardView
            // from this position in the photo album:
            vh.articleName.Text     = listOfArticles[position].Name;
            vh.articlePrice.Text    = listOfArticles[position].SellPriceDisplay;
            vh.articleQuantity.Text = listOfArticles[position].QuantityDisplay;
            vh.sum.Text             = listOfArticles[position].SumDisplay;
            totalSumAllArticles    += listOfArticles[position].Sum;
        }