Class Form1

GettingStartedGuides/WinForms_GettingStarted/Form1.cs:14–76

namespace WinForms_GettingStarted
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Resize += new System.EventHandler(this.Form_Resize);
            webView.NavigationStarting += EnsureHttps;
            InitializeAsync();
        }

        private void Form_Resize(object sender, EventArgs e)
        {
            webView.Size = this.ClientSize - new System.Drawing.Size(webView.Location);
            goButton.Left = this.ClientSize.Width - goButton.Width;
            addressBar.Width = goButton.Left - addressBar.Left;
        }

        void EnsureHttps(object sender, CoreWebView2NavigationStartingEventArgs args)
        {
            String uri = args.Uri;
            if (!uri.StartsWith("https://"))
            {
                webView.CoreWebView2.ExecuteScriptAsync($"alert('{uri} is not safe, try an https link')");
                args.Cancel = true;
            }
        }

        async void InitializeAsync()
        {
            await webView.EnsureCoreWebView2Async(null);
            webView.CoreWebView2.WebMessageReceived += UpdateAddressBar;

            await webView.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync("window.chrome.webview.postMessage(window.document.URL);");
            await webView.CoreWebView2.AddScriptToExecuteOnDocumentCreatedAsync("window.chrome.webview.addEventListener(\'message\', event => alert(event.data));");

        }

        void UpdateAddressBar(object sender, CoreWebView2WebMessageReceivedEventArgs args)
        {
            String uri = args.TryGetWebMessageAsString();
            addressBar.Text = uri;
            webView.CoreWebView2.PostWebMessageAsString(uri);
        }

        private void goButton_Click(object sender, EventArgs e)
        {
            if (webView != null && webView.CoreWebView2 != null)
            {
                webView.CoreWebView2.Navigate(addressBar.Text);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void webView21_Click(object sender, EventArgs e)