I'm building a WCF WindowsService in .NET 4.0. I'd like to make it RESTfull and change the response and request type to JSON. To do that I need to use the WebGetAttribute under the OperationContract in the interface. But I can't find the System.ServiceModel.Web assembly (which is supposed to be in a System.ServiceModel.Web.dll according to MSDN). There's no trace of that DLL in the Add Reference form and if I try "using System.ServiceModel.Web;", it's not working either.
Do you have any idea what my problem is ?