How to Asyncronously Page refersh/Load

Hi Kiran,

Session default time depends on the type of authentication used.
Forms authentication uses it own value for timeout (30 min. by default). A forms authentication timeout will send the user to the login page with the session still active. This may look like the behavior your app gives when session times out making it easy to confuse one with the other.
 For Windows try this in your web.config

You can provide the timeout in web.config file in tag which is by default 20 min.
Or you can use update panel of ajax to partial refresh of page.