asp.net - Redirect to specific page after session expires (MVC6) -

i have c# mvc6 project , want redirect specific page when session expires.

after research tried creating

public class sessionexpireattribute : actionfilterattribute  httpcontext context = httpcontext.current; 

but httpcontext.current not exist in asp.net 5.

how solve problem?

if override 1 of actionfilterattribute methods, can access session enough:

public override void onactionexecuting(actionexecutingcontext context) {     context.httpcontext.session... } 

is sufficient?