using System;

using System.Collections.Generic;

using System.IO;

using System.Net;

public class Program

{

    public static void Main()

    {

        var htmlPrinter = new HtmlPrinter();

        htmlPrinter.PrintHtml("https://google.com/");               

    }

    class HtmlPrinter

    {string html;

        private readonly Dictionary<string, string> _cache = new Dictionary<string, string>();

        public void WebReq(string url){

           var request = WebRequest.Create(url);

                using (var response = (HttpWebResponse)request.GetResponse())

                using (var stream = response.GetResponseStream())

                using (var reader = new StreamReader(stream))

                {

                    html = reader.ReadToEnd();

                }

        }

         public void CachHTML(string url){

            if (!_cache.TryGetValue(url, out string html))

            {

                WebReq(url);

                _cache[url] = html;

            }

       }

 public void PrintHtml(string url)

        {

            WebReq(url);

            CachHTML(url);

            Console.WriteLine(html);

        }

    }

}