gistfile1.cs

public class Question
{
    public int Id { get; set; }
    public string Name { get; set; }
    public List<Answer> Answers { get; set; }
    public List<Comment> Comments { get; set; }
}

public class Answer
{
    public int Id { get; set; }
    public string Name { get; set; }
    public List<Comment> Comments { get; set; }
}

public class Comment
{
    public int Id { get; set; }
    public string Name { get; set; }
}