How to programmatically determine when Web.Config Changes?

On some occasions you would want to run some code for every change in the configuration file, like reload the cache etc.. A change in web.config prompts the app domain to reload. So one should be able to look for application domain shutdown reason to verify a configuration change. Here is how you do can do it

In you Global.asax.cs file add the following code

protected void Application_End(object sender, EventArgs e)
{
    if (HostingEnvironment.ShutdownReason == 

                           ApplicationShutdownReason.ConfigurationChange)
    {
        // Do Something
    }
}

Hope this helps someone.