//2.7
public void addToShoppingBasket(int product, int amount, int session)
{
if (product < 0)
{
throw new Domain.ILLArgumentException("invalid product id");
}
if (session < 0)
{
throw new ILLArgumentException("error - bad session");
}
db.addToShoppingBasket(product, amount, session);
}
public void addToShoppingBasket(int product, int amount, Session session)
{
if (product < 0)
{
throw new ArgumentException("invalid product id");
}
if (session == null)
{
throw new NullReferenceException("error - bad session");
}
db.addToShoppingBasket(product, amount, session);
}
