public string saveLevel(string level)
{
XElement lv;
((XElement)doc.FirstNode).Add(lv = new XElement("level"));
var n = DateTime.Now.ToShortDateString() + DateTime.Now.ToShortTimeString();
lv.Add(new XAttribute("name", n));
lv.Add(new XAttribute("contents", level));
doc.Save(c);
return n;
}