1. Switch to a frame by Index.
Here we are switching to index 1. Index refers to the order of frames on the page. This should be used as a last resort, as frame id or names are much more reliable.
2. Switch to a frame by Name
3. Switch to a frame by Title, Id, or others by passing IWebElement
If you want to switch to a frame by id or title you have to pass in a web element as a parameter:
Also note that if your frame takes a few seconds to come up, you may have to use a wait:
new WebDriverWait(driver, TimeSpan.FromSeconds(10)) .Until(ExpectedConditions.ElementIsVisible(By.Id("Id_Of_Frame")));
Get out of a frame: