Json does not exist in the namespace System

Question

In this tutorial: http://www.asp.net/web-api/videos/getting-started/custom-validation Jon uses

dynamic error = new JsonObject();

with

Answer 1

The Json object works only from Controller class and not outside. Even if we refer System.Web.MVC outside controller, we have access only to JsonResult and not to Json as Json object is protected object of JsonResult. Please refer the below documentation which explains that,

http://msdn.microsoft.com/en-us/library/dd504936(v=vs.118).aspx