title: Sitecore API check in code behind if page is being previewed
body: <p>I have a sublayout in my Sitecore site which is used to perform a redirect via a meta-refresh (a temporary measure) however I'd like editors to be able to preview the page without the redirect happening.  Is there a way in the Page_Load method to check, using the Sitecore API, if the page is being previewed?</p>