如何在使用 CefSharp 将页面打印为 Pdf 之前等待页面加载

如何解决如何在使用 CefSharp 将页面打印为 Pdf 之前等待页面加载

我正在尝试使用 CefSharp 以 pdf 格式导出页面，但即使在线程睡眠之后我也收到未完全加载的页面，是否有任何正确的方法可以在导出页面之前等待页面加载？

    public static int Main(string[] args)
    {
        ///init cefbrowser and pass page for it///
        
        browser.LoadingStateChanged += browserLoadingStateChanged;

        ///close sefbrowser ///
    }

    private static async void browserLoadingStateChanged(object sender,LoadingStateChangedEventArgs e)
    {
        // Check to see if loading is complete - this event is called twice,one when loading starts
        // second time when it's finished
        // (rather than an iframe within the main frame).
        if (!e.IsLoading)
        {
            // Remove the load event handler,because we only want one snapshot of the initial page.
            browser.LoadingStateChanged -= browserLoadingStateChanged;
            Console.WriteLine("Wait");
            Thread.Sleep(12000);
            //Give the browser a little time to render
            // Wait for the screenshot to be taken.
            Console.WriteLine("print");
            await browser.PrintToPdfAsync("D:\\test.pdf");
        }
    }