I need to work with querystring but i'm not sure when i shoud use. Permissions in my page depend of querystring.
I know, i can use in page_load but i need to be sure this is a best practice.
[EDIT]
If I use querystring to permissons in my page when i shoud use querystring?
Example: Show some controls hide others.
[/EDIT]
Sorry my bad english!
Thanks!