raven dictionary test

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Raven.Client.Document;
namespace RavenDynamicTest
{
    class Program
    {
        public class Student
        {
            public string Id { get; set; }
            public string TopLevelProperty { get; set; }
            public Dictionary<string, string> Attributes { get; set; }
            public Dictionary<string, List<Dictionary<string, string>>> CategoryAttributes { get; set; }
        }

        static void Main(string[] args)
        {
            var store = new DocumentStore { Url = "http://localhost:8080", DefaultDatabase = "SchoolDb" };
            store.Initialize();

            //creation
            using (var session = store.OpenSession())
            {
                //now the student:
                var student = new Student();
                //Top level Property
                student.TopLevelProperty = "toplevel";
                //Simple attributes
                student.Attributes = new Dictionary<string, string>();
                student.Attributes["second"] = "second";
                //CategoryAttributes
                student.CategoryAttributes = new Dictionary<string, List<Dictionary<string, string>>>();
                student.CategoryAttributes["EducationHistory"] = new List<Dictionary<string, string>>();

                var dict = new Dictionary<string, string>();
                dict["StartYear"] = "2009";
                student.CategoryAttributes["EducationHistory"].Add(dict);
                session.Store(student);
                session.SaveChanges();
            }

            using (var session = store.OpenSession())
            {
                var test = (from student in session.Query<Student>()
                            where student.CategoryAttributes["EducationHistory"].Any(edu => edu["StartYear"] == "2009")
                            select student).ToList();
            }
        }
    }
}