using System;

using HtmlAgilityPack;

using System.Net;

​

public class Program

{

    public static void Main()

    {

        // website URL

        var html = @"https://www.TechnologyCrowds.com/";

        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

        // declare htmlweb and load html document

        HtmlWeb web = new HtmlWeb();

        var htmlDoc = web.Load(html);

        var favicon = (dynamic)null;

        // extracting icon

        var el = htmlDoc.DocumentNode.SelectSingleNode("/html/head/link[@rel='icon' and @href]");

        if (el != null)

        {

            favicon = el.Attributes["href"].Value;

            // showing output here

            Console.WriteLine(Convert.ToString(favicon));

        }

    }

}