Session state can only be used when enableSessionState is set to true either in a configuration

Question

I am working on Asp.net MVC 2 app with c# by using vs 2010.I am having below mentioned error when I run my app locally under debug mode.

Error message image is as be

Answer 1

also if you are running SharePoint and encounter this error, don't forget to run

Enable-SPSessionStateService -DefaultProvision

or you will continue to receive the above error message.