public abstract class JceStruct
    {
        public abstract void display(StringBuilder stringBuilder, int index);

        public abstract void readFrom(JceInputStream jceInput);

        public abstract void writeTo(JceOutputStream jceOut);
    }

UniPacket packet = new UniPacket();

packet.Put("_data", userInfo);
byte[] encode = packet.encode();

JceCurrency jceCurrency = new JceCurrency(encode);
var user_Info = jceCurrency.getByClass<UserInfo>("_data", new UserInfo());

JceCurrency jceCurrency = new JceCurrency(encode);
var AllJson = jceCurrency.GetAllJsonObj();
var AllJsonStr = AllJson.ToString();