Asp.net Page Redirection

Question

Dear all, I have a web application in which i have users I am using the session variable to save the user type,city,email,state etc and using these session in my application , my application gets very slow may b due to these session or not please let me know and also let me know what are the alternatives instead of session ,


Secondly i have different user types into the system and based on the user type i want to redirect the user to his/her own page i used server.transfer so my login page contains 6 if else because i have 6 user types and based on the user type i redirect that user to his own page what else i should use to make application fast