从XmlDocument用换行符缩进XML的最简单方法是什么？

根据其他答案，我研究

XmlTextWriter

static public string Beautify(this Xmldocument doc){    StringBuilder sb = new StringBuilder();    XmlWriterSettings settings = new XmlWriterSettings    {        Indent = true,        IndentChars = "  ",        newlineChars = "rn",        newlineHandling = newlineHandling.Replace    };    using (XmlWriter writer = XmlWriter.Create(sb, settings)) {        doc.Save(writer);    }    return sb.ToString();}

它比我期望的要多一些代码，但它的工作方式只是桃花心木。