作为ActionResult从控制器的操作中返回XML？

using System.IO;
using System.Xml.Serialization;
using Microsoft.AspNetCore.Mvc;

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

public class MyController : ControllerBase
{
    [HttpGet]
    public ActionResult<string> GetPersonAsXml()
    {
        var person = new Person { Name = "John Doe", Age = 30 };

        var serializer = new XmlSerializer(typeof(Person));
        using var stringWriter = new StringWriter();
        serializer.Serialize(stringWriter, person);
        var xml = stringWriter.ToString();

        return Content(xml, "application/xml");
    }
}