private void OnAddProductButtonClicked()
{
Product newProduct = new Product(curBill);
curBill.AddProduct(newProduct);
OpenEditProductPopup(newProduct);
}
/**
* <summary>
* Scans a product in order to calculate the total price.
* </summary>
* <param name="productCode">string: product code</param>
**/
public void ScanProduct(string productCode)
{
var productItem = GetProductByCode(productCode);
if (_bill == null)
{
_bill = new Bill();
}
_bill.AddProduct(productItem);
}