以缩进形式以编程方式格式化XML，就像Visual Studio的自动格式一样

I haven't found a way using .NET's XmlWriter and associated XmlWriterSettings to format an XML string in indented form exactly the way that Visual Studio does it with its auto-format command (Ctrl-E Ctrl-D, or, depending on keyboard mapping, Ctrl-K Ctrl-D).I haven't found a way using .NET's XmlWriter an