/// <summary>
        /// Serialize object to string of json format
        /// </summary>
        private string JsonSerializer<T>(T t)
        {
            var ser = new DataContractJsonSerializer(typeof(T));
            var ms = new MemoryStream();
            ser.WriteObject(ms, t);
            string jsonString = Encoding.UTF8.GetString(ms.ToArray());
            ms.Close();
            return jsonString;
        }

        /// <summary>
        /// Deserialize string of json format to object
        /// </summary>
        private T JsonDeserialize<T>(string jsonString)
        {
            var ser = new DataContractJsonSerializer(typeof(T));
            var ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
            var obj = (T)ser.ReadObject(ms);
            return obj;
        }

------解决方案--------------------

不懂帮顶！ 我记得看过一些视频 如果转换出现问题最好转换成数组之后再序列化 具体什么情况忘记了。。