Cannot get body of POST from Nancy REST server embedded in Unity game

I'm trying to set up a route for a Nancy POST, where I wish to submit an object in Json format, and use this to trigger an event in the Unity runtime - what I thought should be fairly standard stuff. I thought that by following the example in NancyFX : Deserialize JSON I would be able to bind the body of the request to an object and then use that elsewhere, however I am actually getting this rather mysterious error: ``` Error CS1061: Type 'server.RESTServer' does not contain a definition for 'Bind' and no extension method 'Bind' of type 'server.RESTServer' could be found (are you missing a using directive or an assembly reference?) (CS1061) (server) ``` This is the relevent section from the offending source: ``` using Nancy; namespace server { public class RESTServer : Nancy.NancyModule, RESTInterface { public class LevelInfo { public string index; } public RESTServer () { Delete ["/current/level"] = _ => { UnloadLevel(); return HttpStatusCode.OK; }; Get ["/current/level"] = _ => Level; Post ["/current/level"] = _ => { LevelInfo body = this.Bind<LevelInfo>(); //This is the offending line // snip rest of implementation } } } } ``` My Mono/Monodevelop version info is on pastebin here, and the Assembly Browser shows this, also linked on pastebin, for Nancy. I don't generally do much .net development so I'm sure it's something really simple, but I've already lost an afternoon trying to resolve this issue... Any help would be much appreciated.