new XDocument(
new XElement("ol",
from item in XDocument.Load("http://cnblogs.com/rss").Descendants("item")
select new XElement[]{
new XElement("li",
new XElement("a",(string)item.Element("title"),
new XAttribute("href",(string)item.Element("link"))
)
)
}
)
).WriteTo(new XmlTextWriter(Response.OutputStream,Encoding.UTF8));