public static void Main()
{
List <Animal> animals = new List <Animal>
{
new Duck(),
new Fish(),
new Giraffe()
};
foreach (Animal animal in animals)
{
ISwimmer swimmer = animal as ISwimmer;
if (swimmer == null)
{
continue; // this one can't swim
}
swimmer.SwimTo(new Location());
}
}
public static void PrintWalker(ISwimmer swimmer)
{
swimmer.Swim();
}
public static void swim(this ISwimmer a)
{
Console.WriteLine("splashy,splashy");
}
public void AddSwimmers(ISwimmer swimmer)
{
Swimmers.Add(swimmer);
}
private static void DoSwim(ISwimmer swimmer)
{
swimmer.Swim();
}
public bool Move()
{
ISwimmer self = this;
return(self.Move());
}
