My project developed in asp.net using c#.
I want that if one registered user type url/<his/her username>
where abc is the user name) then he/she directly goto the a.aspx otherwise b.aspx(i.e. actually home page). Now where i write the validation code for autherised user without using any other aspx page.
If any one type only www.xyz.com
then it will display b.aspx
(This type of implementation is done by http://www.itsmylinks.com/