如何在c#中不使用任何模型或映射器将json转换为对象

using System;
using System.Text.Json;

public class MyClass
{
    public string Name { get; set; }
    public int Age { get; set; }
}

class Program
{
    static void Main()
    {
        string json = "{\"Name\":\"John\",\"Age\":30}";

        MyClass obj = JsonSerializer.Deserialize<MyClass>(json);

        Console.WriteLine($"Name: {obj.Name}");
        Console.WriteLine($"Age: {obj.Age}");
    }
}