C# json操作

    class jsonRoot
     {
        public string numPs { get; set; }
        public string qty { get; set; }
     }

     class jsonClass
     {
         public int count { get; set; }
         public List<jsonRoot> root { get; set; }
     }

        private void obj2Json()
        {
            jsonClass jc = new jsonClass();
            jsonRoot jr = new jsonRoot();
             jsonRoot jr2 = new jsonRoot();
            List <jsonRoot> ljr =new List<jsonRoot> ();
            jr.numPs = "aaaaaaaa";
            jr.qty = "111111";
            jr2.numPs = "bbbbbbbb";
            jr2.qty = "2222222";
            ljr.Add (jr); ljr.Add (jr2);
            jc.count = 8;
            jc.root = ljr;
            string js = JsonMapper.ToJson(jc);
            Console.WriteLine(js);
            //打印出   {"count":8,"root":[{"numPs":"aaaaaaaa","qty":"111111"},{"numPs":"bbbbbbbb","qty":"2222222"}]}
        }

        private void json2Obj()
        {
            string json = "{\"count\":8,\"root\":[{\"numPs\":\"aaaaaaaa\",\"qty\":\"111111\"},{\"numPs\":\"bbbbbbbb\",\"qty\":\"2222222\"}]}";
            jsonClass thomas = JsonMapper.ToObject<jsonClass>(json);
            List < jsonRoot > ls= thomas.root;
            Console.WriteLine("-----", thomas.count);
 
        }