asp.net mvc de döviz kurlarını alma

public ActionResult Index()

        {

            

            XmlTextReader oku = new XmlTextReader("http://www.tcmb.gov.tr/kurlar/today.xml");

            XmlDocument dok = new XmlDocument();

            dok.Load(oku);

            XmlNode xdollar = dok.SelectSingleNode("/Tarih_Date/Currency[CurrencyName='US DOLLAR']");

            XmlNode xeuro = dok.SelectSingleNode("/Tarih_Date/Currency[CurrencyName='EURO']");

            XmlNode xsterling = dok.SelectSingleNode("/Tarih_Date/Currency[CurrencyName='POUND STERLING']");

            double dolar = double.Parse(xdollar.ChildNodes[4].InnerText);

            double euro = double.Parse(xeuro.ChildNodes[4].InnerText);

            double sterling = double.Parse(xsterling.ChildNodes[4].InnerText);

            

            ViewData["dolar"] = dolar;

            ViewData["euro"] = euro;

            ViewData["sterling"] = sterling;
         
             //ya da

            Func<XmlNode, double> fnc = delegate(XmlNode x) {
                  return double.Parse(x.ChildNodes[4].InnerText);
            };
            ViewData["dolar"] = fnc(xdollar);
            ViewData["euro"] = fnc(xeuro);
            ViewData["sterling"] = fnc(xsterling);

         
            return View();

        }

//*************************************//

<h2>Index</h2>

Dolar: @ViewData["dolar"]<hr />

Euro: @ViewData["euro"]<hr />

Sterling: @ViewData["sterling"]