/// <summary>
        /// 将对象转换为 JSON 字符串
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string ScriptSerialize<T>(T input)
        {
            string _jsonString = string.Empty;
            if (input != null)
            {
                JavaScriptSerializer _serializerHelper = new JavaScriptSerializer();
                _serializerHelper.MaxJsonLength = int.MaxValue;
                _jsonString = _serializerHelper.Serialize(input);
            }
            return _jsonString;
        }

        /// <summary>
        /// 将指定的 JSON 字符串转换为 T 类型的对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="input"></param>
        /// <returns></returns>
        public static T ScriptDeserialize<T>(string input)
        {
            T rtn = default(T);
            if (!string.IsNullOrEmpty(input))
            {
                JavaScriptSerializer _serializerHelper = new JavaScriptSerializer();
                rtn = _serializerHelper.Deserialize<T>(input);
            }
            return rtn;
        }


        #region 利用JavaScriptSerializer将对象序列化成JSON
        /// <summary>
        /// 利用JavaScriptSerializer将对象序列化成JSON字符串
        /// </summary>
        /// <typeparam name="T">泛型</typeparam>
        /// <param name="entityList">对象集合</param>
        /// <returns>json</returns>
        public static string Serialize<T>(IEnumerable<T> entityList) where T : class
        {
            string _jsonString = string.Empty;
            if (entityList != null)
            {
                JavaScriptSerializer _serializerHelper = new JavaScriptSerializer();
                _serializerHelper.MaxJsonLength = int.MaxValue;
                _jsonString = _serializerHelper.Serialize(entityList);
            }
            return _jsonString;
        }
        #endregion
        #region 利用JavaScriptSerializer将json字符串反序列化
        /// <summary>
        ///利用JavaScriptSerializer将json字符串反序列化
        /// </summary>
        /// <typeparam name="T">泛型</typeparam>
        /// <param name="jsonString"></param>
        /// <returns>IEnumerable</returns>
        public static IEnumerable<T> Deserialize<T>(string jsonString) where T : class
        {
            IEnumerable<T> _list = null;
            if (!string.IsNullOrEmpty(jsonString))
            {
                JavaScriptSerializer _serializerHelper = new JavaScriptSerializer();
                _list = _serializerHelper.Deserialize<IEnumerable<T>>(jsonString);
            }
            return _list;
        }
        #endregion

C# Json 序列化与反序列化一

Josn序列化与反序列化demo