Пример #1
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 public ModelDuck()
 {
     FlyBehavior   = new FlyNoWings();
     QuackBehavior = new Quack();
 }
Пример #2
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 public MallardDuck()
 {
     QuackBehavior = new Quack();
     FlyBehavior   = new FlyWithWings();
 }