static void AbstractDemo() { TRex trex = new TRex(); Triceratops triceratops = new Triceratops(); trex.EatFood(); trex.Move(); trex.Swim(); trex.Horns(); trex.SkinType(); trex.Teeth(); triceratops.EatFood(); triceratops.Move(); triceratops.Swim(); triceratops.Horns(); triceratops.SkinType(); triceratops.Teeth(); }