private void UpdateProductQuantity(List<Product> p_list, String p_productName, float p_quantityToAdd) 
    {
        for(Product product : p_list) 
        {
            if(product != null && product.GetTypeProduct().GetName().equals(p_productName)) 
            {
                product.SetQuantity(product.GetQuantity() + p_quantityToAdd);
                return;
            }
        }
    }