c# webview2 serialize loadings of a few pages with waithandle

Question

folks. I want to crawl data from a few pages with webview2. I am about to load and extract data from the pages one by one. I wrote some codes but they didn't work. I am stuck. Here are the core codes:

async Task Crawl()
{
    AutoResetEvent loadEvent = new AutoResetEvent(false);
    wv2.NavigationCompleted += Wv2_NavigationCompleted;

    foreach (var url in urls)
    {
        wv2.Source = new Uri(url);
        loadEvent.WaitOne();

        var data = await ExtractData();
        ...
    }

    wv2.NavigationCompleted -= Wv2_NavigationCompleted;
            
    void Wv2_NavigationCompleted(object sender, CoreWebView2NavigationCompletedEventArgs e)
    {
        loadEvent.Set();
    }
}