Way to monitor the Clipboard without polling

MonitorClipboard.cs

public MainWindow()
{
    InitializeComponent();
    SharpClip = new SharpClipboard();
    SharpClip.ClipboardChanged += ClipboardChanged;
}

private readonly SharpClipboard SharpClip;
private bool IsTriggered = false;
private async void ClipboardChanged(object sender, ClipboardChangedEventArgs e)
{
    if (!IsTriggered)
    {
        IsTriggered = true;
        await DoCheckClipboard();
    }
}
private async Task DoCheckClipboard()
{
    await Task.Delay(20);
    var text = string.Empty;
    try
    {
        if (Clipboard.ContainsText(TextDataFormat.Html))
        {
            text = Clipboard.GetText(TextDataFormat.Html);
            // ^^ URL from M$ Edge / Chromium
        }
        else if (Clipboard.ContainsText(TextDataFormat.UnicodeText))
        {
            text = Clipboard.GetText(TextDataFormat.UnicodeText);
            // ^^ URL from Firefox
        }
    }
    catch (Exception ex)
    {
        text = ex.Message;
    }
    IsTriggered = false;
    // undone - check for valid URL
    var yesNo = await Task.Run(() => MessageBox.Show(text, "Link übernehmen?", MessageBoxButton.OKCancel, MessageBoxImage.Question));
    // undone - sync with Bitly
}