how can i convert this json to .net object example: "results": [ "43853","43855","43856","43857",{"questionType": 3,"choiceAnswers": [],}]

I wants to map this JSONinto my dot net model.how can i map this JSON into to hold the data into my class.please give me suggetions.here is the Json

{"results": [
   "43853",
   "43855",
   "43856",
   "43857",
   {
     "questionType": 3,
     "choiceAnswers": [123]   
   }
 ]}