使用前先用json字符串转换出实体类
Root r = new Root(); r.lang = "zh-CN"; r.payload = new Payload(); r.payload.parm = new Params(); r.payload.parm.appKey = "--"; r.payload.parm.appSecret = "--"; string json = JsonConvert.SerializeObject(r);
Root rD = JsonConvert.DeserializeObject<Root>(json);
原文：https://www.cnblogs.com/shigure/p/12806777.html