c# XmlSerializer反序列化程序缺少默认命名空间

using System;
using System.IO;
using System.Xml.Serialization;

// 定义一个类，属性和字段与XML文档中的元素相对应
public class MyClass
{
    public string Name { get; set; }
    public int Age { get; set; }
}

public class Program
{
    public static void Main(string[] args)
    {
        string xmlString = "<MyClass><Name>John</Name><Age>25</Age></MyClass>";

        // 实例化XmlSerializer对象，指定要反序列化的类的类型
        XmlSerializer serializer = new XmlSerializer(typeof(MyClass));

        // 使用Deserialize方法将XML格式的字符串转换为对象
        using (StringReader reader = new StringReader(xmlString))
        {
            MyClass myObject = (MyClass)serializer.Deserialize(reader);
            Console.WriteLine($"Name: {myObject.Name}, Age: {myObject.Age}");
        }
    }
}