public void DisplayParentsAB()
Console.WriteLine("A and B are my parents");
public class ChildC: Parent
public void DisplayChildC()
Console.WriteLine("I am the child C");
public class ChildD: Parent
public void DisplayChildD()
Console.WriteLine("I am the child D");
public static void Main(string[] args)
ChildC cc = new ChildC();
ChildD cd = new ChildD();