Newtonsoft.Json.JsonConvert的反序列化的问题

[tm474342778]

这边反序列化报错误

哪位大神可以帮忙解决下哈

[全栈极简]

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string json = "{\"activity_key\":\"WFR67DAZ\",\"count\":1,\"records\":[{\"amount\":\"0\",\"date_created\":\"1473667433062\",\"item_key\":\"40fen\",\"mw_id\":\"d121ad121asd213132fasd231131fa\",\"uid\":\"13909998888\"}],\"type\": 2 }";

            ActivityResult result = JsonConvert.DeserializeObject<ActivityResult>(json);
            Console.WriteLine(result.activity_key);
        }
    }

    public class ActivityResult
    {
        public string activity_key { get; set; }
        public int count { get; set; }
        public int type { get; set; }
        public List<Result> records { get; set; }
    }

    public class Result
    {
        public string amount { get; set; }
        public string date_created { get; set; }
        public string item_key { get; set; }
        public string mw_id { get; set; }
        public string uid { get; set; }
    }
}

[tm474342778]

报这个错误了