默认设置的情况下，如果获取的数据串跟我们本地的字段数据不匹配，是不会报错的，这就会带来困扰，json.net其实可以通过配置来实现成员缺失时报错。

public class Account
{
    public string FullName { get; set; }
    public bool Deleted { get; set; }
}

string json = @"{
  'FullName': 'Dan Deleted',
  'Deleted': true,
  'DeletedDate': '2013-01-20T00:00:00'
}";

try
{
    JsonConvert.DeserializeObject<Account>(json, new JsonSerializerSettings
    {
        MissingMemberHandling = MissingMemberHandling.Error
    });
}
catch (JsonSerializationException ex)
{
    Console.WriteLine(ex.Message);
    // Could not find member 'DeletedDate' on object of type 'Account'. Path 'DeletedDate', line 4, position 23.
}

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