json 转字符和字符转json

  public static T JSONToObject<T>(string json)
        {
            T obj = Activator.CreateInstance<T>();
            using (MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(json)))
            {
                DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
                return (T)serializer.ReadObject(stream);
            }
        }

        public static string ObjectToJSON<T> (T t)
        {
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(t.GetType());
            using (MemoryStream stream = new MemoryStream())
            {
                serializer.WriteObject(stream, t);
                return Encoding.UTF8.GetString(stream.ToArray());
            }
        }