Consider the following code:

public class CustomerList{
private List customers;
public delegate void ChangeHandler(CustomerList customers);
public event ChangeHandler ChangedList;
public CustomerList(){customers = new List();
}
public void Add(Customer c){customers. Add(c);
}
public static CustomerList operator + (CustomerList customers, Customer c) {
customers. Add(c);return customers;
}
}

As you can see, the CustomerList class overloads the binary + operator to make it easier for you to add Customer objects to a CustomerList object.
Now, write code that uses the += operator to add a Customer object named newCustomer to a CustomerList object named customers.