using System; namespace MyApplication { // Abstract class abstract class Animal { // Abstract method (does not have a body) public abstract void animalSound(); // Regular method public void sleep() { Console.WriteLine("Zzz"); } } // Derived class (inherit from Animal) class Pig : Animal { public override void animalSound() { // The body of animalSound() is provided here Console.WriteLine("The pig says: wee wee"); } } class Program { static void Main(string[] args) { Pig myPig = new Pig(); // Create a Pig object myPig.animalSound(); myPig.sleep(); } } }