vb.net - dispose of all variables?

how can i make sure i dispose of ALL my variables and sessions when i close the a开发者_开发问答pplication?

i already have session.abandon(), but does it still keep all the other objects stored somewhere in the memory?

i've noticed that my w3wp.exe process keeps going up as i am testing my application. what is a good way to keep mem usage under control?

When the process exits, all the memory it was using goes away. You don't have to worry about it.