public void Test()
{
Visitor visitorA = new ConcreteVisitorA();
Visitor visitorB = new ConcreteVisitorB();
Element elementA = new ConcreteElementA();
Element elementB = new ConcreteElementB();
Assert.That(elementA.Accept(visitorA), Is.EqualTo("ConcreteElementA visited by ConcreteVisitorA"));
Assert.That(elementA.Accept(visitorB), Is.EqualTo("ConcreteElementA visited by ConcreteVisitorB"));
Assert.That(elementB.Accept(visitorA), Is.EqualTo("ConcreteElementB visited by ConcreteVisitorA"));
Assert.That(elementB.Accept(visitorB), Is.EqualTo("ConcreteElementB visited by ConcreteVisitorB"));
}
public abstract void VisitConcreteElementA(ConcreteElementA concreteElementA);
public override void VisitConcreteElementA(ConcreteElementA concreteElementA)
{
Console.WriteLine("{0} visited by {1}", concreteElementA.GetType().Name, this.GetType().Name);
}