Httpcontext.Current.Session vs Session

Question

 

 

what is diffenrece between HttpContext.Current.Seesion and Session?

 

 

and if HttpContext is recreated during every new request and destroyed after response  then how  values stored in the session of HttpContext remains intact during the whole session of a

 user (Means a single a session may involve many request then how values in the Session is intact and accessible during different request of a single session)...

 

 

thanks in advance.............