Application Object and Session Object

Web applications are rely on stateless protocol i.e. HTTP and thus to maintain the each user level information, some techniques are used. 
Session is a ready to use object. When user interacts with your application page, an unique id is maintained for a time fame. This time-frame for auto expiry can be defined by you using Session.Timeout. You declare your sessions in Global.asax file OR you can directly add/use at your page. I prefer to put in Global.asax file, so that at any time you can find how many session variables your application is using.
To add a session @code-behind page:
Session["mySessionName"] = "Session-Value";
You can access the value/use this session variable on any page. 

Application variables are same like Sessions but they are accessible at application level. Means they are common to all users. So when you require some global level information for your application, you use Application variables.

Both are ready to use (built-in) objects and we use them directly without creating instance(object of them).

Using Session and Application Objects in ASP .NET 

 

Hi Arun,

Please refer the below link

http://www.c-sharpcorner.com/UploadFile/051e29/session-and-application-in-Asp-Net/


Thanks