JSON.NET 序列化 JObject，同时忽略 null 属性

使用 JSON.NET 序列化 JObject 并忽略 null 属性

csharp
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
    public string Address { get; set; }
}
public class Program
{
    public static void Main()
    {
        Person person = new Person
        {
            Name = "John",
            Age = 30,
            Address = null
        };
        JObject jObject = JObject.FromObject(person, new JsonSerializer
        {
            NullValueHandling = NullValueHandling.Ignore
        });
        string json = jObject.ToString();
        Console.WriteLine(json);
    }
}

{
  "Name": "John",
  "Age": 30
}