Redirecting in asp.net?

you mean after redirect login and entering credentials user should redirect to job detail or apply page
To do this
on job
set session as fromjob or you want
and on login page check if user com from job page then session["fromjob"] has some value then it will redirect to job applypage
else // if user directly come to login
redirect to userhomepage or default

checck

if(session["loginname"]!=null)
{
redirect to apply job
}
else
{
redirect login page
}

and at login click set session as loginname  for logged in user