public static void Main(string[] args)
{
Animal animal = new Animal();
animal.Greet();
Dog dog = new Dog();
dog.Greet();
}
static void Main(string[] args)
{
Animal animal = new Animal();
animal.Greet();
Dog dog = new Dog();
dog.Greet();
Console.ReadLine();
}
static void Main(string[] args)
{
Animal a1 = new Animal();
a1.Talk();
a1.Sing();
a1.Greet();
Animal a2 = new Dog(); // Object of type Animal which references to object of type Dog
a2.Talk();
a2.Sing();
a2.Greet();
Console.ReadLine();
}