public void ShouldSwitchToIframeByIndexAndBackToDefaultContent()
{
driver.Url = iframesPage;
driver.SwitchTo().Frame(0);
IWebElement element = driver.FindElement(By.Name("id-name1"));
Assert.IsNotNull(element);
driver.SwitchTo().DefaultContent();
element = driver.FindElement(By.Id("iframe_page_heading"));
Assert.IsNotNull(element);
}