Workbooks — Günlük Dolar Kuru

string path = "http://www.tcmb.gov.tr/kurlar/today.xml";
System.Xml.Linq.XDocument xDoc = System.Xml.Linq.XDocument.Load(path);
var usd = (from x in xDoc.Descendants("Currency") where (string)x.Attribute("Kod") == "USD" select x).FirstOrDefault();
usd.Element("ForexBuying").Value;