/// <summary>
        /// Once product is selected, changes list of that products.
        /// In addition changes list of larger products being consumed.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ConsumeProductBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            Product        product  = (Product)consumeProductBox.SelectedItem;
            List <Product> products = ProductDb.GetProductsInRange(product.ProductID, product.Height, product.Width, product.Length);

            produceProductBox.DataSource = products.ToList();
        }