1-) C# RMOS - para döviz kur alma

using System;

using System.Windows.Forms;

using System.Xml;

namespace WindowsFormsApp3

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        public static readonly string eur = "EUR", usd = "USD";

        private void button1_Click(object sender, EventArgs e)

        {

            decimal eur_tl = getKur(eur);

            decimal usd_tl = getKur(usd);

            Console.WriteLine(eur + " = " + eur_tl + " TL");

            Console.WriteLine(usd + " = " + usd_tl + " TL");

        }

        public decimal getKur(String kurKodu)

        {

            string exchangeRate = "http://www.tcmb.gov.tr/kurlar/today.xml";

            var xmlDoc = new XmlDocument();

            xmlDoc.Load(exchangeRate);

            decimal doviz = Convert.ToDecimal(xmlDoc.SelectSingleNode("Tarih_Date/Currency [@Kod='" + kurKodu + "']/BanknoteSelling").InnerXml.Replace(".", ","));

            return doviz;

        }

    }

}