这里是我的(样本)类和枚举：

public class Request {
    public RequestType request;
}

public enum RequestType
{
    Booking = 1,Confirmation = 2,PreBooking = 4,PreBookingConfirmation = 5,BookingStatus = 6
}

和代码(只是为了确保我不会做错了)

Request req = new Request();
req.request = RequestType.Confirmation;
XmlSerializer xml = new XmlSerializer(req.GetType());
StringWriter writer = new StringWriter();
xml.Serialize(writer,req);
textBox1.Text = writer.ToString();

This answer(到另一个问题)似乎表明枚举应该序列化为ints作为默认，但它似乎不这样做。这里是我的输出：

<?xml version="1.0" encoding="utf-16"?>
<Request xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <request>Confirmation</request>
</Request>

我已经能够序列化作为值，通过在每个值上放置一个“[XmlEnum(”X“)]”属性，但这似乎是错误的。