static void Main(string[] args)
{
Animal animalObj = new Animal();
animalObj.MakeSound();
Dog dogObj = new Dog();
dogObj.MakeSound();
dogObj.DoTricks();
Animal dog = new Dog();
dog.MakeSound();
//Dog wholeDog = (Cat)dog;
//wholeDog.PatTheCat();
Cat catObj = new Cat();
catObj.MakeSound();
Animal cat = new Cat();
cat.MakeSound();
Console.ReadKey();
}