public Products getProduct(string filter)
        {
            Products        product = new Products();
            ProcessProducts process = new ProcessProducts();

            product = process.getProduct(filter);
            if (product == null)
            {
                product = new Products();
            }
            return(product);
        }
        public void FinishSale(string json)
        {
            ProcessProducts process = new ProcessProducts();

            process.SaveSale(json);
        }