XmlDocument doc = new XmlDocument();
doc.LoadXml("<WebSites><WebSite><URL>http://xml.luohuedu.net/</URL><Title>【孟宪会之精彩世界】之XML开发者园地</Title><Desc>讨论XML技术和Web技术地专业站点。</Desc></WebSite><WebSite><URL>http://lucky_elove.www1.dotnetplayground.com/</URL><Title>【孟宪会之精彩世界】之.NET开发者园地</Title><Desc>讨论.NET技术和应用的专业站点。</Desc></WebSite></WebSites>");
StringWriter sw = new StringWriter();
XmlTextWriter xtw = new XmlTextWriter(sw);
xtw.Formatting = Formatting.Indented;
doc.WriteTo(xtw);
textBox1.Text = sw.ToString();