json - Call dynamic method in c# -

i have json request parameters

 {   "exp": 0,   "iat": 0,   "method": "login",   "apisecretkey": "y109m113e122",   "username": "test@test.com",   "password": "test",   "isguestcustomerid": 1 } 

and method in wcf rest api service(c#)

 login(string apisecretkey, string username, string password, int isguestcustomerid) 

how pass these request parameter login method?

note : have around 200 methods call in way different parameters like

 register(string apisecretkey, string emailid, string password, string firstname, string lastname, string phonenumber, string gender, string dateofbirth, string companyname) , on different methods  

thanks in advance.

using json.net,

var jobj = jobject.parse(json); object instance = .... ; //instance of class containing methods..  var mi = instance.gettype().getmethod(jobj["method"].tostring(), bindingflags.instance | bindingflags.public | bindingflags.nonpublic); var parameters = mi.getparameters()                  .select(p => convert.changetype(jobj[p.name].tostring(), p.parametertype))                  .toarray();  object retval = mi.invoke(instance, parameters);