public Point Move(int dx, int dy) => new Point(x + dx, y + dy);   
public void Print() => Console.WriteLine(First + " " + Last);  
// Works with operators, properties, and indexers too.  
public static Complex operator +(Complex a, Complex b) => a.Add(b);  
public string Name => First + " " + Last;   
public Customer this[long id] => store.LookupCustomer(id);