如何将XslCompiledTransform的输出转换为XmlReader?

XslCompiledTransform 对象,我希望输出 XmlReader StreamReader 或者一个 XmlDocument ,但当我尝试

在下面的例子中, stylesheet 是我的 XslCompiledTransform 对象。前两个 Console.WriteLine XmlTextReader 正在等待文本,所以我可能需要将其包装在StreamReader中。。?我做错什么了?

MemoryStream transformed = new MemoryStream();
stylesheet.Transform(input, args, transformed);
transformed.Position = 0;

StreamReader s = new StreamReader(transformed);
Console.WriteLine("s = " + s.ReadToEnd()); // writes XML
transformed.Position = 0;

XmlDocument doc = new XmlDocument();
doc.Load(transformed);
Console.WriteLine("doc = " + doc.OuterXml); // writes XML
transformed.Position = 0;

XmlReader reader = new XmlTextReader(transformed);
Console.WriteLine("reader = " + reader.ReadOuterXml()); // no XML written