OpenQA.Selenium.StaleElementReferenceException: 'stale element reference: element is not attached to the page document

In my selenium test I get an error: OpenQA.Selenium.StaleElementReferenceException: 'stale element reference: element is not attached to the page document'

In this code(error picture):

 public bool TrySwitchToIframeWithChild(By childBy)
        {
            IWebElement el;
            if (TryFindElement(childBy, out el))
                return true;
            IReadOnlyCollection<IWebElement> frames = Driver.FindElements(By.TagName("iframe"));

            foreach (var frame in frames)
            {
                Driver.SwitchTo().Frame(frame); 
                if (TrySwitchToIframeWithChild(childBy))
                    return true;
            }
            Driver.SwitchTo().DefaultContent();
            return false;
        }

Line Driver.SwitchTo().Frame(frame); have an error, may be someone know how it is possible to upgrade the code?