RootObject ac = new RootObject();

            ac = JsonConvert.DeserializeObject<RootObject>(sb.ToString());

            sb2.Append(ac.status);

            sb2.Append("<br>");

            sb2.Append(ac.lastResult.message);

            Context.Response.Write(sb2.ToString());

  public class RootObject

    {

        public string status { get; set; }

        public string billstatus { get; set; }

        public string message { get; set; }

        public string autoCheck { get; set; }

        public string comOld { get; set; }

        public string comNew { get; set; }

        public LastResult lastResult { get; set; }

    }

    public class LastResult

    {

        public string message { get; set; }

        public string nu { get; set; }

        public string ischeck { get; set; }

        public string condition { get; set; }

        public string com { get; set; }

        public string status { get; set; }

        public string state { get; set; }

        public List<Data> data { get; set; }

    }

    public class Data

    {

        public string time { get; set; }

        public string ftime { get; set; }

        public string context { get; set; }

    }