{
   "Rule":[
      {
         "rule_code":"Speed",
         "rule_desc":"Used to validate speed",
         "rule_msg":[
            {
               "speed_limit":50,
               "rule_id":1,
               "Rule Level":"Manditory"
            }
         ]
      },
      {
         "rule_code":"length",
         "rule_desc":"Used to validate lenght",
         "rule_msg":[
            {
               "Size":500,
               "rule_id":1,
               "Rule Level":"Relax"
            }
         ]
      }
   ]
}

private class Jsonobj
{
    List<Rule> Rules { get; set; }
}


private class Rule{

    string rule_code {get; set; }

    string rule_desc {get; set; }

    IEnumerable<Rule_msg> { get; set;}

}

private class Rule_msg{

   int speed {get; set;}

   int length {get; set;}

}