using System;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;
using HtmlAgilityPack;

namespace XMLParser
{
    class Program
    {
        static async Task Main(string[] args)
        {
            double usdPrice, eurPrice;
            var url = @"https://www.cbr-xml-daily.ru/daily.xml";
            var rawHtml = await new HttpClient().GetStringAsync(url);
            var doc = new HtmlDocument();
            doc.LoadHtml(rawHtml);
            var valutes = doc.DocumentNode.ChildNodes["ValCurs"].ChildNodes;
            foreach (var valute in valutes)
            {
                var charCode = valute.ChildNodes["CharCode"].InnerText;
                var price = valute.ChildNodes["Value"].InnerText;
                if (charCode == "USD")
                {
                    usdPrice = double.Parse(price);
                    Console.WriteLine($"1 {charCode} = {usdPrice}");
                }
                else if (charCode == "EUR")
                {
                    eurPrice = double.Parse(price);
                    Console.WriteLine($"1 {charCode} = {eurPrice}");
                }
            }
            ;
        }
    }
}