public static void PurchaseItem(string customerName, string itemName, int quantity)
{
var item = InventorySystem.GetItem(itemName);
var customer = CustomerSystem.GetCustomer(customerName);
customer.ShoppingCart.Add(item, quantity);
CustomerSystem.UpdateCustomer(customer);
}
public static void AddCustomer(string name)
{
CustomerSystem.UpdateCustomer(new Customer {
Name = name
});
}
