C# 无法从System.Int64强制转换或转换为System.Collections.Generic.List

当我尝试从TwitterAPI反序列化JSON响应时，我遇到以下异常。它有时会通过，但有时会有问题

以下是课程：

public static List<Tweet> Newtwt = new List<Tweet>();

public class Url2
{
    public string url { get; set; }
    public string expanded_url { get; set; }
    public string display_url { get; set; }
    public List<int> indices { get; set; }
}

public class Url
{
    public List<Url2> urls { get; set; }
}

public class Description
{
    public List<object> urls { get; set; }
}

public class Entities
{
    public Url url { get; set; }
    public Description description { get; set; }
}

public class User
{
    public int id { get; set; }
    public string id_str { get; set; }
    public string name { get; set; }
    public string screen_name { get; set; }
    public string location { get; set; }
    public string description { get; set; }
    public string url { get; set; }
    public Entities entities { get; set; }
    public bool @protected { get; set; }
    public int followers_count { get; set; }
    public int friends_count { get; set; }
    public int listed_count { get; set; }
    public string created_at { get; set; }
    public int favourites_count { get; set; }
    public int utc_offset { get; set; }
    public string time_zone { get; set; }
    public bool geo_enabled { get; set; }
    public bool verified { get; set; }
    public int statuses_count { get; set; }
    public string lang { get; set; }
    public bool contributors_enabled { get; set; }
    public bool is_translator { get; set; }
    public string profile_background_color { get; set; }
    public string profile_background_image_url { get; set; }
    public string profile_background_image_url_https { get; set; }
    public bool profile_background_tile { get; set; }
    public string profile_image_url { get; set; }
    public string profile_image_url_https { get; set; }
    public string profile_link_color { get; set; }
    public string profile_sidebar_border_color { get; set; }
    public string profile_sidebar_fill_color { get; set; }
    public string profile_text_color { get; set; }
    public bool profile_use_background_image { get; set; }
    public bool default_profile { get; set; }
    public bool default_profile_image { get; set; }
    public object following { get; set; }
    public bool follow_request_sent { get; set; }
    public object notifications { get; set; }
}

public class Entities2
{
    public List<object> hashtags { get; set; }
    public List<object> symbols { get; set; }
    public List<object> urls { get; set; }
    public List<object> user_mentions { get; set; }
}

public class RootObject
{
    public string created_at { get; set; }
    public object id { get; set; }
    public string id_str { get; set; }
    public string text { get; set; }
    public string source { get; set; }
    public bool truncated { get; set; }
    public object in_reply_to_status_id { get; set; }
    public object in_reply_to_status_id_str { get; set; }
    public object in_reply_to_user_id { get; set; }
    public object in_reply_to_user_id_str { get; set; }
    public object in_reply_to_screen_name { get; set; }
    public User user { get; set; }
    public object geo { get; set; }
    public object coordinates { get; set; }
    public object place { get; set; }
    public object contributors { get; set; }
    public int retweet_count { get; set; }
    public int favorite_count { get; set; }
    public Entities2 entities { get; set; }
    public bool favorited { get; set; }
    public bool retweeted { get; set; }
    public string lang { get; set; }
    public bool? possibly_sensitive { get; set; }
}

public class Tweet
{
    public string UserName { get; set; }
    [JsonProperty(PropertyName = "text")]
    public string Message { get; set; }
    [JsonProperty(PropertyName = "id")]
    public object ID { get; set; }
    [JsonProperty(PropertyName = "created_at")]
    public DateTime TwitTime { get; set; }
}

以下是详细错误：

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我刚刚找到了答案

正如文档所述，问题在于Twitter API的局限性：

当应用程序超过给定API端点的速率限制时，Twitter API现在将返回HTTP 429错误

我超出了限制，所以它给出了一个例外

如果达到给定端点上的速率限制，您将看到HTTP 429消息的主体：

{
  "errors": [
    {
      "code": 88,
      "message": "Rate limit exceeded"
    }
  ]
}

所以它只返回一个JSON格式的错误消息，并将其传递给反序列化函数，而反序列化函数又给出了该错误

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谢谢大家的建议。

你能发布twitterapi返回的sting吗？在调试器中运行，你会看到哪个属性不是你期望的（与你试图反序列化的JSON字符串相比）@EhsanUllah我根据不同的用户在一个循环中运行它。因此我有大约120个用户，因此它将为每个用户获取20条tweet…有几件事需要检查，您正在验证吗？文档中说，您需要为该操作提供支持。您是否也超过了查询限制？API还提到每15分钟有180条记录的限制。您似乎在循环中拉2400。@VishalSuthar如Adriano所述，在本例中，您必须对其进行调试，以确定按预期返回的属性。顺便说一下，试着把列表改成列表

https://api.twitter.com/1.1/statuses/user_timeline.json

{
  "errors": [
    {
      "code": 88,
      "message": "Rate limit exceeded"
    }
  ]
}