Where is the System.Runtime.Serialization.Json namespace?

I've added the reference to System.Runtime.Serialization dll to my project but still can't find the System.Runtime.Serialization.Json namespace and hence can't find the DataContractJsonSerializer cla开发者_运维知识库ss. What am I missing here?

Try in System.ServiceModel.Web.dll

Are you running .NET 2.0 ? Its first supported in 3.5 and 4.0 check here.

I think this library is now deprecated in favour of Json.NET. JsonObject is a JObject and uses Json.NET library.

Documentation

You might just need to update it in your VS, it can be added in the project but not updated