sessions and masterpages

Question

Dear Friends,

 

please help me in using sessions and master pages in asp.net using c#

 

1) I have 2 master pages . 1 page for admin with all options & 2nd master page is for normal users with limited options

 

2) if admin logins, 1st master page should be added during runtime to the all web pages with all options.

 

3) if normal employee logins, 2nd master page should be added during runtime to all the web pages with limited options.