C# (CSharp) Polymorphism ShapeVisitor примеры использования

Пример #1

 public override void accept(ShapeVisitor visitor)
 {
     visitor.visit((float)(radious * radious * System.Math.PI));
 }

Пример #2

 public abstract void accept(ShapeVisitor visitor);

Пример #3

 public override void accept(ShapeVisitor visitor)
 {
     visitor.visit(length * length);
 }