<meta http-equiv="Refresh" content="n;url"/>
where n is the number of seconds, and url is the URL to refresh to. If you leave the URL off, then the page refreshes itself.
<meta http-equiv="refresh" content="8;url=http://abc.xyz/>
where '8' refers to the number of seconds that will elapse before the page is refreshed;
'url' is the new url redirect to. It can be excluded which means the current page will be reloaded.
Reference Link :- Auto-refreshing ASP.NET web pages