private void button1_Click(object sender, EventArgs e) { var ret = storeProxy.MakeaSell(client_name.Text, client_email.Text, client_address.Text, book_title.Text, Convert.ToInt32(quantityValue.Value)); switch (ret) { case 1: MessageBox.Show("Inventory stock updated"); break; case 2: MessageBox.Show("Insufficient stock for sale. An order was created"); warehouseProxy.AddOrder(book_title.Text, Convert.ToInt32(quantityValue.Value) + 10); break; default: break; } Close(); }