public async Task<System.Drawing.Image> GetImage(string url)
        {
            NavigationTask? navTask = null;

            TaskCompletionSource<object?> completionSourceNav = new TaskCompletionSource<object?>();
            TaskCompletionSource<object?> completionSourceJS = new TaskCompletionSource<object?>();

            using JSExecutor jsex = new JSExecutor("rendered", _webView, completionSourceJS);

            _webView.ThreadRunner.Send(() =>
            {
                navTask = _webView.LoadUrl(url);
                navTask.OnDone(() =>
                {
                    completionSourceNav.SetResult(null);
                });
            });

            await completionSourceNav.Task;

            Task timeoutTask = Task.Delay(TimeSpan.FromSeconds(30));

            Task completedOne = await Task.WhenAny(completionSourceJS.Task, timeoutTask);

            if (ReferenceEquals(timeoutTask, completedOne))
            {
                throw new InvalidOperationException("Did not complete in time.");
            }

            System.Drawing.Image? webImage = null;
            _webView.ThreadRunner.Send(() =>
            {
                webImage = _webView.Capture();
            });

            if (webImage == null)
            {
                throw new InvalidOperationException("Could not get image");
            }
            return webImage;
        }
        private class JSExecutor : IDisposable
        {
            private readonly string _funcName;
            private readonly WebView _webView;
            private readonly TaskCompletionSource<object?> _completion;

            private readonly List<string> _consoleMessages = new List<string>();

            internal IEnumerable<string> ConsoleMessages => _consoleMessages;

            internal JSExecutor(string funcName, WebView webView, TaskCompletionSource<object?> completion)
            {
                _funcName = funcName;
                _webView = webView;
                _completion = completion;
                _webView.JSExtInvoke += HandleJSExtInvoke;
                _webView.ConsoleMessage += HandleConsoleMessage;
            }

            private void HandleConsoleMessage(object sender, ConsoleMessageEventArgs e)
            {
                _consoleMessages.Add(e.Message);
            }

            public void Dispose()
            {
                _webView.ConsoleMessage -= HandleConsoleMessage;
                _webView.JSExtInvoke -= HandleJSExtInvoke;
            }

            private void HandleJSExtInvoke(object sender, JSExtInvokeArgs e)
            {
                if (_funcName.Equals(e.FunctionName))
                {
                    _completion.TrySetResult(null);
                }
            }
        }