using System;

using System.Collections.Generic;

​

class SampleBase

{

    public SampleBase()

    {

        Console.WriteLine("====== Init SampleBase ======");

        if(this is SampleDerived)

        {

            var derived = this as SampleDerived;

            derived.Print();

        }

    }

}

​

class SampleDerived : SampleBase

{

    private int number = 100;

    private List<string> names = new List<string> { "John", "Park", "David", "Kim" };

    public int Number { get { return number; }}

    public List<string> Names { get { return names; }}

    public SampleDerived()

    {

        Console.WriteLine("====== Init SampleDerived ======");

        Print();

    }

    public void Print()

    {

        Console.WriteLine(number);

        foreach(var name in names)

            Console.WriteLine(name);

        Console.WriteLine();

    }

}

​

public class Program

{

    public static void Main()

    {

        new SampleDerived();

    }

}