Selenium-处理弹窗弹出新页面的切换问题

  WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(60));
            wait.Until(driver => {
                return driver.WindowHandles.Count== waitforHandlesCount;

            });

            string current_handler = driver.CurrentWindowHandle;
            var all_handler = driver.WindowHandles;
            driver.SwitchTo().Window(all_handler[all_handler.Count-1]);