waitforcontrol 有点方法是在控件类型上调用的。并且控件存在是正确的，但这并不意味着控件已准备就绪（可能正在加载）

The waitforcontrol kinda methods are called on a control type. And control exist would be true, but it doesn't mean that the control is ready (It probably be loading)

一般做法是在超级控件上调用waitforcontrolready方法父母（说浏览器）。我已按照以下方法修改了您的方法，

The general practice is call the waitforcontrolready method on the super parent. (Say Browser). I've modified your method as below,

 public void WaitForPageToLoad(BrowserWindow browser, int WaitTimeOut)
    {
        // Waiting on all threads enable to wait for any background process to complete
        Playback.PlaybackSettings.WaitForReadyLevel = WaitForReadyLevel.AllThreads;
        // Wait 
        browser.WaitForControlReady(WaitTimeOut * 1000);
        // Revert the playback settings (As waiting on all threads may sometime have a toll on execution speed 
        Playback.PlaybackSettings.WaitForReadyLevel = WaitForReadyLevel.UIThreadOnly;
    }

然后只要在页面加载的任何地方调用方法来等待，切记以秒为单位传递浏览器和超时。

then just call the method to wait, where ever you do a page load. Remember to pass browser and timeout in seconds as a parameter. Something like,

    ClickButton(Repo.LeftButton(Browser));
    WaitForPageLoad(Browser, 120);

希望有帮助！