/// 
    /// Json扩展方法类(编译时检查,类型安全)    /// 
    public static class JsonContextExtension    {        /// 
        /// 从一个对象信息生成Json串        /// 
        /// 转换对象        /// 
     
      对象类型
             /// 
             public static string ToJson
     
      (this T obj)        {            if (typeof(T).FullName.Contains("<>f__AnonymousType"))            {                //匿名类型                var serializer = new System.Web.Script.Serialization.JavaScriptSerializer();                return serializer.Serialize(obj);            }            else            {                var serializer = new DataContractJsonSerializer(typeof(T));                string json = string.Empty;                using (MemoryStream stream = new MemoryStream())                {                    serializer.WriteObject(stream, obj);                    json = Encoding.UTF8.GetString(stream.ToArray());                    stream.Close();                }                return json;            }        }        /// 
      
        /// 从一个Json串生成对象信息        /// 
        /// 
      JSON字符串        /// 
      
       对象类型
              /// 
              public static T JsonToObject
      
       (this string jsonString)        {            DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));            using (MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(jsonString)))            {                var jsonobj = (T)serializer.ReadObject(stream);                stream.Close();                return jsonobj;            }        }    }