json 序列化与反序列化类

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添加System.runtime.serialization.dll引用
public static class JsonSerializer    {        private static ITracing _tracing = TracingManager.GetTracing(typeof(JsonSerializer));        /// <summary>        /// 将指定对象序列化为 JavaScript 对象表示法 (JSON) 数据，并将生成的 JSON 写入流中。        /// </summary>        /// <typeparam name="T">对象类型</typeparam>        /// <param name="stream">流对象</param>        /// <param name="obj">序列化对象</param>        public static void Serialize<T>(Stream stream, T obj)        {            JsonSerializeProxy<T>.Default.Serialize(stream, obj);        }        /// <summary>        /// 将指定对象序列化为 JavaScript 对象表示法 (JSON) 数据，并返回对应的字符串。        /// </summary>        /// <typeparam name="T">对象类型</typeparam>        /// <param name="obj">序列化对象</param>        /// <returns>JavaScript 对象表示法 (JSON) 字符串</returns>        public static string Serialize<T>(T obj)        {            using (MemoryStream ms = new MemoryStream())            {                JsonSerializeProxy<T>.Default.Serialize(ms, obj);                string jsonStr = Encoding.UTF8.GetString(ms.ToArray());                _tracing.InfoFmt("{0} json serialize result: {1}", typeof(T).ToString(), jsonStr);                return jsonStr;            }        }        public static T DeSerialize<T>(string jsonStr)        {            return JsonSerializeProxy<T>.Default.DeSerialize(jsonStr);        }    }    public class JsonSerializeProxy<T>    {        private static readonly JsonSerializeProxy<T> _default = new JsonSerializeProxy<T>();        private DataContractJsonSerializer _serializer;        public static JsonSerializeProxy<T> Default        {            get            {                return _default;            }        }        private JsonSerializeProxy()        {            _serializer = new DataContractJsonSerializer(typeof(T));        }        public void Serialize(Stream stream, T obj)        {            _serializer.WriteObject(stream, obj);        }        /// <summary>        /// 将JSON字符串反序列化为对象        /// </summary>        /// <param name="jsonStr">json字符串</param>        /// <returns></returns>        public T DeSerialize(string jsonStr)        {            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonStr));            T obj = (T)_serializer.ReadObject(ms);            return obj;        }    }