XElement Site = new XElement("Sites", 
 
from site in sites 
 
orderby site.Id //descending 
 
select new XElement("Site", 
 
new XAttribute("Name", site.Name), 
 
new XAttribute("Id", site.Id), 
 
new XAttribute("Address", site.Address))); 
 
XDocument xdoc = new XDocument(); 
 
xdoc.Add(Site);
 
xdoc.Save(
"bilyaz.xml");