string jsonText = "[{\"a\": \"aaa\",\"b\": \"bbb\",\"c\": \"ccc\"},{\"a\": \"aa\",\"b\": \"bb\",\"c\": \"cc\"}]";

            var mJObj = JArray.Parse(jsonText);

            //需求，删除列表里的a节点的值为\"aa\"的项

            IList<JToken> _ILIST = new List<JToken>(); //存储需要删除的项

            JArray _JARRAY = new JArray();

            foreach (var ss in mJObj)  //查找某个字段与值

            {

                if ((((JObject)ss)["a"]).ToString() == "aa")

                {

                    _ILIST.Add(ss);

                    _JARRAY.Add(ss);

                    Console.Write(_ILIST[]);

                    Console.Write(_ILIST[].GetHashCode());

                    Console.Write("\r\n---------------------------\r\n");

                    Console.Write("\r\n---------------------------\r\n");

                    Console.Write(_JARRAY[]);

                    Console.Write(_JARRAY[].GetHashCode());

                    Console.Write("\r\n---------------------------\r\n");

                    Console.Write("\r\n---------------------------\r\n");

                    Console.Write(mJObj[].GetHashCode());

                }

            }

            foreach (var item in _ILIST)  //移除mJObj  有效

            {

                mJObj.Remove(item);

            }

            foreach (var item in _JARRAY)  //移除mJObj  无效

            {

                mJObj.Remove(item);

            }