在xmldocument中插入

[jjstar]

请问如何在xmldocument中插入
<?xml version="1.0" encoding="GB2312"?>
<?xml-stylesheet type="text/xsl" href="MessageBoard.xslt"?>
这样的东西

[Oceanson]

先保存xml文件，用文本方式打开，添加

[jjstar]

有没有先进点的方法啊

[saucer]

frankly, Oceanson's method is not so bad

using System;
using System.Xml;

class TestXml
{
public static void Main()
{
String sFile = "a.xml";
XmlDocument doc = new XmlDocument();
doc.Load(sFile);

XmlProcessingInstruction newPI;
String PItext = "type='text/xsl' href='book.xsl'";
newPI = doc.CreateProcessingInstruction("xml-stylesheet", PItext);
doc.InsertBefore(newPI, doc.FirstChild);

XmlTextWriter xtw = new XmlTextWriter(sFile, System.Text.Encoding.GetEncoding("GB2312"));
xtw.Formatting = Formatting.Indented;
xtw.WriteStartDocument();
doc.Save(xtw);
xtw.WriteEndDocument();
xtw.Close();
}
}