1 public class HumanFactory : IFactory
 2     {
 3         public virtual IRace CreateRace()
 4         {
 5             return new Human();
 6         }
 7     }
 8     public class HumanFactoryAdvanced: HumanFactory
 9     {
10         public override IRace CreateRace()
11         {
12             Console.WriteLine("123");
13             return new Human();
14         }
15     }