private void button1_Click(object sender, EventArgs e)
        string EvaluateJavaScriptResult;
        var frame = chromeBrowser.GetMainFrame();
        var task = frame.EvaluateScriptAsync("(function() { return document.getElementById('searchInput').value; })();", null);
        task.ContinueWith(t =>
            if (!t.IsFaulted)
                var response = t.Result;
                EvaluateJavaScriptResult = response.Success ? (response.Result.ToString() ?? "null") : response.Message;
                MessageBox.Show(EvaluateJavaScriptResult);
        }, TaskScheduler.FromCurrentSynchronizationContext());
    }

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using CefSharp;
using CefSharp.WinForms;
namespace WebAppWorkAround
public partial class Form1 : Form
    public Form1()
        InitializeComponent();
        InitializeChromium();
    List<string> classList = new List<string>();
    public ChromiumWebBrowser chromeBrowser;
    private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    private void Form1_Load(object sender, EventArgs e)
    private void InitializeChromium()
        CefSettings settings = new CefSettings();
        Cef.Initialize(settings);
        chromeBrowser = new ChromiumWebBrowser("https://en.wikipedia.org/wiki/Main_Page");
        this.panel1.Controls.Add(chromeBrowser);
        chromeBrowser.Dock = DockStyle.Fill;
    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        Cef.Shutdown();
    public string extract;
    private void button1_Click(object sender, EventArgs e)
        object EvaluateJavaScriptResult;
        var frame = chromeBrowser.GetMainFrame();
        var task = frame.EvaluateScriptAsync("(function() { return document.getElementsByClassName('mw-headline')[0].value; })();", null);
        task.ContinueWith(t =>
            if (!t.IsFaulted)
                var response = t.Result;
                EvaluateJavaScriptResult = response.Success ? (response.Result ?? "null") : response.Message;
                MessageBox.Show(EvaluateJavaScriptResult.ToString());
        }, TaskScheduler.FromCurrentSynchronizationContext());