using System;

using HtmlAgilityPack;

using System.Net;

using System.Linq;

public class Program

{

    public static void Main()

    {

        // finally calling web method to grab all images from web page

        ExtractAllImages();

    }

    static void ExtractAllImages()

    {

        // declare html document

        var document = new HtmlWeb().Load("https://www.technologycrowds.com/2019/12/net-core-web-api-tutorial.html");

        // now using LINQ to grab/list all images from website

        var ImageURLs = document.DocumentNode.Descendants("img")

                                        .Select(e => e.GetAttributeValue("src", null))

                                        .Where(s => !String.IsNullOrEmpty(s));

        // now showing all images from web page one by one

        foreach(var item in ImageURLs)

        {

            if (item != null)

            {

                Console.WriteLine(item);

            }

        }

    }

}