Csharp 序列化和反序列化ASP.NETCore.NET 6 C#App中的泛型对象

这是我的要求:

作为一个Page个对象，它有一个字符串属性Name和一个包含Field个对象的通用列表. Field对象具有以下公共字符串字段Name和公共通用字段Value. Calue可以是类型string, int(..以及功能中的更多类型). 当它是一个整数值时，它应该有一个类型为int的最小值和最大值. 当它是字符串值时，它应该有一个int类型的MaxLength值.

我想用Json将这个Page对象序列化，并将其反序列化为Page对象.

这就是我try 过的:

public abstract class Field
{
    public string Name { get; set; }
    public abstract FieldType Type { get; }
}

public enum FieldType
{
    Text,
    Number,
}

public class StringField : Field
{
    public override FieldType Type => FieldType.Text;

    public string Value { get; set; }
    public int? MaxLength { get; set; }
}

public class NumberField : Field
{
    public override FieldType Type => FieldType.Number;

    public int Value { get; set; }
    public int? Min { get; set; }
    public int? Max { get; set; }
}


public class Page
{
    public string Name { get; set; }
    public IEnumerable<Field> Fields { get; set; }
}

[ApiController]
[Route("[controller]")]
public class DemoController : ControllerBase
{
    private readonly ILogger<DemoController> _logger;

    public DemoController(ILogger<DemoController> logger)
    {
        _logger = logger;
    }

    [HttpGet]
    public IActionResult Get()
    {
        var page = new Page
        {
            Name = "TestPage",
            Fields = new List<Field>
            {
                new StringField
                {
                    Name = "Textfield",
                    MaxLength = 10,
                    Value = "DefaultValue"
                },
                new NumberField
                {
                    Name = "NumberField",
                    Value = 5,
                    Min = 0,
                    Max = 10,
                }
            }
        };

        return Ok(page);
    }

    [HttpPost]
    public ActionResult Post([FromBody] Page value)
    {
        return Ok(value);
    }

但是Value没有被正确地序列化和反序列化. 我可以自由 Select 任何Nuget套餐和更换型号.

这是GET方法的输出:

{
    "name": "TestPage",
    "fields": [
        {
            "name": "Textfield",
            "type": 0
        },
        {
            "name": "NumberField",
            "type": 1
        }
    ]

}