Rehber C# kullanarak Web sitesinden veri çekmek (Web scraping): AngleSharp!

using System;
using AngleSharp;
using AngleSharp.Common;
using AngleSharp.Dom;

namespace ConsoleApp1
{
    class Program
    {
       
static IConfiguration config = Configuration.Default.WithDefaultLoader();
        static IBrowsingContext context;
        static IDocument document;
        static async Task Main(string[] args)
        {
            Console.Clear();
           context = BrowsingContext.New(config);
           await BaslikCek("https://techolay.net/sosyal");
           await DolarCek();
        }
        static async Task BaslikCek(string site)
        {
            document = await context.OpenAsync(site);
            Console.WriteLine("Site basligi: " + document.Title);
        }
    }
}

static async Task DolarCek()
        {
            document = await context.OpenAsync("https://bigpara.hurriyet.com.tr/doviz/dolar/");

            var dolar = document.QuerySelector("span.value.up");

            Console.WriteLine(dolar.TextContent.Trim() + " Dolar Alis Fiyati");
        }

<Window x:Class="AngleSharpResimCekme.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:AngleSharpResimCekme"
        mc:Ignorable="d"
        Background="Black"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <StackPanel Margin="20">
            <Button x:Name="btnResimCek" Content="Resmi Getir" Click="btnResimCek_Click" Height="30"/>
            <Image x:Name="imgGosterici" Height="300" Margin="0,20,0,0" Stretch="Uniform"/>
            <TextBlock x:Name="txtDurum" TextAlignment="Center" Margin="5"/>
        </StackPanel>
    </Grid>
</Window>

using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using AngleSharp;
using AngleSharp.Dom;
using AngleSharp.Common;

namespace AngleSharpResimCekme
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private async void btnResimCek_Click(object sender, RoutedEventArgs e)
        {
            string siteUrl = "https://tr.wikipedia.org/wiki/Anasayfa";

            try
            {
                var config = Configuration.Default.WithDefaultLoader();
                var context = BrowsingContext.New(config);
                var document = await context.OpenAsync(siteUrl);

                // Google'ın logosunu bulalım
                var resimElementi = document.QuerySelector("img.mw-file-element");

                if (resimElementi != null)
                {
                    string resimUrl = resimElementi.GetAttribute("src");

                    if (resimUrl.StartsWith("//"))
                    {
                        resimUrl = "https:" + resimUrl;
                    }

                    BitmapImage bitmap = new BitmapImage();
                    bitmap.BeginInit();
                    bitmap.UriSource = new Uri(resimUrl, UriKind.Absolute);
                    bitmap.CacheOption = BitmapCacheOption.OnLoad;
                    bitmap.EndInit();

                    imgGosterici.Source = bitmap;
                    txtDurum.Text = "Resim başarıyla yüklendi!";
                }
                else
                {
                    txtDurum.Text = "Resim bulunamadı!";
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Hata: " + ex.Message);
            }
        }
    }
}