how to retrieve the list of all the values (thus, all the session)
for one specific session variable ?

for exemple, let's say I have a session variable : Session("Foobar")

I'd like to display
Session Id 32323 : Session("Foobar")=1
Session Id 53433 : Session("Foobar")=3
Session Id 13235 : Session("Foobar")=22
Session Id 55323 : Session("Foobar")=52

Thank you