C# 测试失败，出现“错误”；元素引用是过时的；在Firefox中，但在chrome中传递相同的代码

在firefox中运行测试时，我收到以下错误

“OpenQA.Selenium.StaleElementReferenceException:的元素引用已过时；元素不再附加到DOM，不在当前帧上下文中，或者文档已刷新”

同样的代码也适用于chrome

它在以下代码块中失败：

public static string GetElementTextByXPath(string XPath, string expectedText = null)
    {
      string elementNotFound = FrameworkSettings.msgElementNotFound;


      if (IsElementPresentByXpath_Continue(XPath))
      {

        WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(Int32.Parse(FrameworkSettings.ImplicitWaitTimeout_Long)));

        wait.Until((d) => { return d.FindElement(By.XPath(XPath)); });

        ElementScrollIntoViewByXPath(XPath);

        OutlineSelectedElement(driver.FindElement(By.XPath(XPath)), "get");



        if (expectedText == null)
        {

          wait.Until((d) => { return !string.IsNullOrWhiteSpace(d.FindElement(By.XPath(XPath)).Text); });
        }
        else
        {

          wait.Until((d) => { return d.FindElement(By.XPath(XPath)).Text == expectedText; });
        }

        return driver.FindElement(By.XPath(XPath)).Text;
      }
      else
      {
        return elementNotFound;
      }
    }

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哪一行抛出了错误？嗨，Christine，下面是OutlineSelectedElement（driver.FindElement（By.XPath（XPath）），“get”）；