{"messages":
  [
   {
     "to":"79222222222",
     "status":
        {
          "groupId":1,
          "groupName":
          "PENDING",
          "id":7,
          "name":"PENDING_ENROUTE",
          "description":"Message sent to next instance"
        },
     "smsCount":1,
     "messageId":"4ad104e0-2222-2c2a-ab22-d22dd2c222ce"
   }
  ]
}

using Newtonsoft.Json;
//...
var log = JsonConvert.DeserializeObject<class_name>(JSON_string);