Example of versionned survey object.

MySurvey2010.cs

// survey definitions

public abstract class SurveyDefinition{
  public string Id{ get; set; }
  public string Survey{ get; set; }
  public string Version{ get; set; }
  public abstract Survey Generate();
}

public class MySurvey2010 : SurveyDefinition{
  public MySurvey2010(){
    Id = "550e8400-e29b-41d4-a716-446655440000";
    Survey = "My Survey";
    Version = "2010";
  }

  public override Survey Generate(){
    var survey = new Survey(this);

    survey.Pages.Add("page-1", p=> {
      p.Questions.Add(new TextBoxQuestion("page-1-q-1", "How big is this building?"));
      p.Questions.Add(new YesNoQuestion("page-1-q-2", "Does it have a door?"));
      return p;
    });

    survey.Pages.Add("page-2", p=> {
      p.Questions.Add(new DropDownListQuestion("page-2-q-1", "How big is the building?", new[]{ "Pretty big.", "Way huge." }));
      return p;
    });

    return survey;
  }
}

// survey structure

public class Survey{
  public Survey(SurveyDefinition definition){
    Definition = definition;
    Pages = new List<Page>();
  }

  public SurveyDefinition Definition{ get; private set; }
  public IList<Page> Pages{ get; private set; }
}

public class Page{
  public string Id{ get; set; }
  public IList<IQuestion> Questions{ get; set; }
}

// question implementations

public interface IQuestion{
  string Id{ get; }
  MvcHtmlString Render(HtmlHelper html); // http://msdn.microsoft.com/en-us/library/system.web.mvc.mvchtmlstring.aspx
}

public abstract class Question : IQuestion{
  public Question(string id){
    Id = id;
  }

  public string Id{ get; private set; }
  public abstract MvcHtmlString Render(HtmlHelper html);
}

public class TextBoxQuestion : IQuestion{
  public TextBoxQuestion(string id, string label) : base(id){
    Label = label;
  }

  public string Label{ get; private set; }

  public override MvcHtmlString Render(HtmlHelper html){
    return html.TextBox(this.Id, this.Label);
  }
}

// controller code

public class SurveyController : Controller{
  public ViewResult Page(string pageId){
    var survey = new MySurvey2010().Generate();
    var page = survey.Pages.Single(p=> p.Id == pageId);

    return View(page);
  }
}

// view (page.spark)

<strong>Questions for page ${Model.Id}:</strong>
<ul>
  <li each="var question in Model.Questions">${question.Render(Html)}</li>
</ul>