Скачать или смотреть Base class pointer to derived class object

Base class pointer to derived class object

using System;
namespace CsharpOops
{
class Animal
{
protected string name;
public void sleep()
{
Console.WriteLine(name + " Sleep");
}
}
class Dog : Animal
{
public Dog()
{
name = "Dog";
}
public void bark()
{
Console.WriteLine(name + " Bark");
}
}
class Program
{
static void Main(string[] args)
{
//A base class pointer can point to a derived class object, but vice versa in not true.
Animal mydog = new Dog();
mydog.sleep();
//mydog.bark();
Console.ReadKey();
}
}
}