可以使用XmlWriter将XML写入内存吗？

我正在创建一个返回XML的ASHX,但是当我这样做时它需要一条路径

XmlWriter writer = XmlWriter.Create(returnXML, settings)

但是returnXML现在只是一个空字符串(猜测它不起作用),但是我需要将XML编写成我可以作为响应文本发送的东西.我尝试了XmlDocument,但它给了我一个错误,期待一个字符串.我在这里错过了什么？

如果你真的想写入内存,请传入StringWriter或者StringBuilder像这样:

using System;
using System.Text;
using System.Xml;

public class Test
{
    static void Main()
    {
        XmlWriterSettings settings = new XmlWriterSettings();
        settings.Indent = true;        
        StringBuilder builder = new StringBuilder();

        using (XmlWriter writer = XmlWriter.Create(builder, settings))
        {
            writer.WriteStartDocument();
            writer.WriteStartElement("root");
            writer.WriteStartElement("element");
            writer.WriteString("content");
            writer.WriteEndElement();
            writer.WriteEndElement();
            writer.WriteEndDocument();
        }
        Console.WriteLine(builder);
    }
}

但是,如果要将其直接写入响应,则可以传入以下HttpResponse.Output内容TextWriter:

using (XmlWriter writer = XmlWriter.Create(Response.Output, settings))
{
    // Write into it here
}

我身边缺少一些东西:刷新XmlWriter的缓冲区:

static void Main()
{
    XmlWriterSettings settings = new XmlWriterSettings();
    settings.Indent = true;        
    StringBuilder builder = new StringBuilder();

    using (XmlWriter writer = XmlWriter.Create(builder, settings))
    {
        writer.WriteStartDocument();
        writer.WriteStartElement("root");
        writer.WriteStartElement("element");
        writer.WriteString("content");
        writer.WriteEndElement();
        writer.WriteEndElement();
        writer.WriteEndDocument();

        writer.Flush();

    }
    Console.WriteLine(builder);
}