static void Main(string[] args) { ObjectStructure o = new ObjectStructure(); o.Attach(new ConcreteElementA()); o.Attach(new ConcreteElementB()); ConcreteVisitor1 v1 = new ConcreteVisitor1(); ConcreteVisitor2 v2 = new ConcreteVisitor2(); o.Accept(v1); o.Accept(v2); Console.Read(); }