internal void Clear()
 {
     ModelBasket.Instance().Clear();
     ValueName.Text  = "";
     ValuePrice.Text = "";
     ValueSum.Text   = "0.0";
 }
 public void add(Product product)
 {
     ModelBasket.Instance().setProduct(product);
     ValueName.Text  = product.getName();
     ValuePrice.Text = product.getPrice();
     ValueSum.Text   = ModelBasket.Instance().getSum().ToString();
 }
        private void bt_buy_Click(object sender, EventArgs e)
        {
            active = false;
            FormFinish formFinish = new FormFinish();

            manager.setSize(ModelBasket.Instance().getSum().ToString());
            manager.setNumber("1");
            formFinish.setManger(this.manager);
            formFinish.Show();
        }