static void Main(string[] args) { Bear oso = new Bear { AnimalName = "Grizzly Bear", }; Chicken pollo = new Chicken { AnimalName = "El Macho Burracho", }; Eagle aguila = new Eagle { AnimalName = "Bald Eagle", }; AnimalUtility.DoSomething(oso); AnimalUtility.DoSomething(pollo); AnimalUtility.DoSomething(aguila); Console.ReadLine(); }