Refresh a page asp.net

Once the page is rendered to the client you have only two ways of forcing a refresh. One is Javascript
setTimeout("location.reload(true);", timeout);

The second is a Meta tag:
<meta http-equiv="refresh" content="600">
You can set the refresh intervals on the server side.
for more detail
http://www.grizzlyweb.com/webmaster/javascripts/refresh.asp