The Home Module of my first Nancy app.

HomeModule.cs

public class HomeModule : NancyModule
{
  private MongoCollection<Comment> _comments;

  public HomeModule(MongoCollection<Comment> comments)
  {
    _comments = comments;

    Get["/"] = Index;
    Post["/AddComment"] = AddComment;
    Post["/DeleteComment"] = DeleteCommente;
  }

  private Negotiator Index(dynamic parameters)
  {
    var model = new
    {
      Title = "Hello Nancy!",
      Comments = _comments.FindAll().ToList()
    };

    return Negotiate
        .WithView("Index")
        .WithModel(model);
  }

  private Response DeleteComment(dynamic parameter)
  {
    var query = Query<Comment>.EQ(m => m.Id, (string)Request.Form.Id);
    _comments.Remove(query);            
    return Response.AsRedirect("/", RedirectResponse.RedirectType.Permanent);
  }

  private Response AddComment(dynamic parameter)
  {
    if (!Request.Form.Comment.HasValue)
      return Response.Context.Response.StatusCode = HttpStatusCode.BadRequest;

    _comments.Save(new Comment { Text = Request.Form.Comment });

    return Response.AsRedirect("/", RedirectResponse.RedirectType.Permanent);
  }
}