Notification based cache invalidation with database records in ASP.Net using C#

How to use notification based cache invalidation in asp.net c# using sql server?

For the first time when my page is loaded I need to fetch the data and store it in cache and bind it in a listview.

Soon as i made changes in my database sql server should notifies asp.net to update the cache.

What can i used instead of pollTimes to check whether there is an update in my table?