static void Main()
{
Duck littleDuck = new RubberDuck();
Duck woodenDuck = new WoodenDuck();
Duck simleDuck = new SimpleDuck();
Duck fakeDuck = new FakeDuck();
Console.WriteLine("1st duck");
littleDuck.PerformFly();
littleDuck.PerformQuack();
littleDuck.Swim();
Console.WriteLine("\n");
Console.WriteLine("2nd duck");
woodenDuck.PerformFly();
woodenDuck.PerformQuack();
woodenDuck.Swim();
Console.WriteLine("\n");
Console.WriteLine("3rd duck");
simleDuck.PerformFly();
simleDuck.PerformQuack();
simleDuck.Swim();
Console.WriteLine("\n");
Console.WriteLine("4th duck");
fakeDuck.PerformFly();
fakeDuck.PerformQuack();
fakeDuck.Swim();
Console.ReadKey();
}
public void CheckSimpleDuck()
{
var wd = new SimpleDuck();
wd.Show();
wd.Fly();
wd.Quack();
wd.Swim();
}