Q:

What dlls must i reference to get access to JsonArray in .net framework 4.5

I am trying to use the JsonArray class in a new empty asp.net mvc4 project in visual studio 2012 RC. However, I can't seem to get access to the class.
I read in the documentation that the class is defined in the System.Runtime.Serialization.dll in the namespace System.Json. However, when I have added the dll file in my project, and open it in Object Browser, the namespace System.Json is not in there.
Any ideas what could be wrong? Have they relocated the class in the RC?

A:

If you have Json.net installed add a using statement
using Newtonsoft.Json.Linq
then you can use JArray in place of JsonArray   and JObject in place of JsonObject

A:

I think you need Json.Net
From Scott Hanselman blog

We on the web team will be including JSON.NET as the default JSON
  Serializer in Web API when it releases, so that'll be nice.

