using OpenQA.Selenium.Support.UI;
using ExpectedConditions = SeleniumExtras.WaitHelpers.ExpectedConditions;
 internal static class Class1
  {
      var wait = new WebDriverWait(WebDriverManager.Driver, TimeSpan.FromSeconds(5));
      wait.Until(ExpectedConditions.FrameToBeAvailableAndSwitchToIt(iframeId));
}