using System;

                using System.Xml;   

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        string exchangeRate = "https://www.tcmb.gov.tr/kurlar/202110/15102021.xml";

        var xmlDoc = new XmlDocument();

        xmlDoc.Load(exchangeRate);

        Console.WriteLine(xmlDoc.InnerText);

    }

}