当我将具有枚举属性的类的对象序列化为JSON时,如果该值为null,则生成的json被borked

const obj = {
  name: 'John',
  age: null,
  gender: 'male'
};

const jsonString = JSON.stringify(obj);
console.log(jsonString); // 输出：{"name":"John","gender":"male"}

using Newtonsoft.Json;

public class Person
{
    public string Name { get; set; }
    public int? Age { get; set; }
    public string Gender { get; set; }
}

var person = new Person
{
    Name = "John",
    Age = null,
    Gender = "male"
};

var settings = new JsonSerializerSettings
{
    NullValueHandling = NullValueHandling.Ignore
};

var jsonString = JsonConvert.SerializeObject(person, settings);
Console.WriteLine(jsonString); // 输出：{"Name":"John","Gender":"male"}