获取调用web api得到的数据中嵌套数据

使用web api获得一个字符串
{"code":"1","message":"","data":{"id":"10000000","device_step":[{"device_process_step_paramList":[{"param":"11111","status":1}]}]}}通过JsonConvert.DeserializeObject和图片代码

，取出了device_step，怎样才能取出param

    public class data
    {
        public string id { get; set; }

        public List<device_dto> device_step{get;set;}
    }

    public class device_dto
    {
         public List<device_process_step_param> device_process_step_paramList { get; set; }
    }

    public class device_process_step_param
    {
        public string param { get; set; }

        public int status { get; set; }
    }

仅供参考