c# - WCF REST JSON argument polymorphism -

i'm implementing rest service json message format using wcf. have method should take argument of different types (but derived form basic class). , wonder if approach use extended class conversion operators in case?

example (ommiting datacontract, datamember etc.):

    class classone     {         public string name { get; set; }     }      class classtwo : classone     {         public int { get; set; }     }      class classthree : classone     {         public int b { get; set; }     }      class classextended     {         public string name { get; set; }          public int { get; set; }          public int b { get; set; }          public static implicit operator classtwo(classextended extended)         {             return new classtwo()             {                 name = extended.name,                 = extended.a             };         }          public static implicit operator classthree(classextended extended)         {             return new classthree()             {                 name = extended.name,                 b = extended.b             };         }     }      void test(classextended extended)     {         // using classthree here     } 

while haven't used restful services in wcf, use knowntypes time handle polymorphism on our datacontracts

here's link more info: http://msdn.microsoft.com/en-us/library/ms730167.aspx