using System;

public class Program

{

    public static void Main()

    {

        Result res = new DataResult();

        Console.WriteLine("{0}.IsSuccess = {1}", res.GetType().Name, res.IsSuccess);

​

        res = new BetterDataResult();

        Console.WriteLine("{0}.IsSuccess = {1}", res.GetType().Name, res.IsSuccess);

    }

}

​

class Result

{

    virtual public bool IsSuccess {get {return true;} }

}

​

class DataResult : Result

{

    public new bool IsSuccess {get {return false;} }

}

​

class BetterDataResult : Result

{

    override public bool IsSuccess {get {return false;} }

}

​