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I am trying to setup a controller using the Services Framework in DNN 6.2 and return JSON from a GET request. The request is failing with the following error: "Attempt by method '' to access method 'System.Web.Mvc.Controller.Json(System.Object, System.Web.Mvc.JsonRequestBehavior)' failed."
I am using this code as a sample, https://github.com/sschlesier/ExploreSettings (MVC_62 branch).
I have tried references to System.Web.MVC versions 2 and 3, and both return the same error.
Is it possible to return JSON data without haveing to write a custom ActionResult?