mvc 4 assembly reference missing for Json.Encode
References in solutions explorer > right click > Add reference Under Assemblies > Framework, search for “System.Web.Helpers” Double click System.Web.Helpers version 2.0.0.0 and click ok. Find the System.Web.Helpers you’ve just added > right click it > properties. Change “Copy Local” from false, to true And now @Json.Encode should work. Update