如何使用C#解码JSON字符串？

using System;
using System.Text.Json;

public class Program
{
    public static void Main()
    {
        string jsonString = "{\"name\":\"John\", \"age\":30}";

        // 使用JsonSerializer.Deserialize方法解码JSON字符串
        var jsonOptions = new JsonSerializerOptions
        {
            PropertyNameCaseInsensitive = true
        };
        var person = JsonSerializer.Deserialize<Person>(jsonString, jsonOptions);

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

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