using System;

using System.Collections;

using System.Collections.Generic;                   

​

public class Program

{

    public static void Main()

    {

        Question q1 = new Question(1, "test question");

        Question q2 = new Question(1, "test question");

        Console.WriteLine(q1 == q2);

        Console.WriteLine(q1.Equals(q2));

        var d = new Dictionary<Question, QuestionDetails>();

        d[q1] = new QuestionDetails("some question details");   

        Console.WriteLine(d[q1].Details);

    }

}

​

public class Question

{

    public Question(int id, string title)

    {

        ID = id;

        Title = title;

    }

    public int ID {get; private set;}

    public string Title {get; private set;}

    public decimal Price {get; private set;}        

}

​

public class QuestionDetails

{

    public QuestionDetails(string details)

    {

        Details = details;

    }

    public string Details { get; private set; }

}