jsonnet_circuar_refs_example.cs

  class Person
  {
      public string Name { get; set; }
      public Person BestFriend { get; set; }
  }

  [HttpGet]
  public ActionResult TestPeopleData()
  {
      var john = new Person { Name = "John" };
      var alicia = new Person { Name = "Alicia", BestFriend = john };
      var mark = new Person { Name = "Mark", BestFriend = john };

      var people = new List<Person> { john, alicia, mark };

      var json = JsonConvert.SerializeObject(people, Formatting.Indented,
          new JsonSerializerSettings { PreserveReferencesHandling = PreserveReferencesHandling.Objects });

      return Content(json, "application/json");
  }