Self Hosted WCF Rest service ERROR : Type 'Newtonsoft.Json.Linq.JToken' is a recursive collection data contract which is not supported -

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i have wcf rest service that's self hosted. works fine until decided have use jtoken (newtonsoft.json.linq.jtoken). got error :

type 'newtonsoft.json.linq.jtoken' recursive collection data contract not supported. consider modifying definition of collection 'newtonsoft.json.linq.jtoken' remove references itself.

i've seen answers post, one , others. fact is, i'm hosting services within internal program (in company work, can't show :-( ). i'm doing it's self hosted, implementations , interfaces of services aren't wcf service library, class library, can't access menu they're talking in answers (where there's : "reuse types in specified referenced assemblies").

i couldn't find solution , use jtoken.

here's service contract : 

[servicecontract]     public interface isearchservice     {         [operationcontract]         [webinvoke(method = "post", requestformat = webmessageformat.json, responseformat = webmessageformat.json,             uritemplate = "search/")]         list<client> searchclient(jtoken jsonbody);     }

my hosting done in post : how create wcf endpointbehaviors in code rather configuration? (i had without configuration file).

hope question clear. thank help


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