/// <summary>
        /// JSON序列化
        /// </summary>
        /// <typeparam name="T">要序列化的类型</typeparam>
        /// <param name="obj">要序列化的对象</param>
        /// <returns>序列化后的对象</returns>
        public static string Serialize<T>(T obj)
        {
            DataContractJsonSerializer serilializer = new DataContractJsonSerializer(typeof(T));
            using (Stream stream = new MemoryStream())
            {
                serilializer.WriteObject(stream, obj);
                stream.Flush();
                stream.Position = 0;
                StreamReader reader = new StreamReader(stream);
                return reader.ReadToEnd();
            }
        }

        /// <summary>
        /// JSON反序列化
        /// </summary>
        /// <typeparam name="T">要反序列化的类型</typeparam>
        /// <param name="source">要反序列化的字符串</param>
        /// <returns>类型T的一个实例</returns>
        public static T Deserialize<T>(string source)
        {
            using (MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(source)))
            {
                DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
                return (T)serializer.ReadObject(ms);
            }
        }