This is in reference to a problem I had which I was able to find the solution to here on Stack Overflow.
This wasn’t my question, but it was the same exact problem I had. How do I know that I need to import a specific DLL file to use a specific namespace? I saw no reference to this on either the MSDN page or the Object Explorer, and even ReSharper didn’t pick up on it. Is this referenced anywhere?
From http://msdn.microsoft.com/en-us/library/system.runtime.serialization.json.datacontractjsonserializer.aspx:
DataContractJsonSerializer Class
Serializes objects to the JavaScript Object Notation (JSON) and deserializes JSON data to objects. This class cannot be inherited.
Namespace: System.Runtime.Serialization.Json
Assembly: System.ServiceModel.Web (in System.ServiceModel.Web.dll)