Winforms - Multiple Backgroundworker .net?

I need to run multiple task in the background using backgroundwoker

e.g dim mybacgroundwokers(10) as backgroundwoker

in the backgroundworker event procedure, can i do somthing like this, cos i don't have an idea

mybackgroundwoker_dowork(,,index)

select case index
case 1
'dowork for backgroundworker1
case 2
'dowork for backgroundworker2
end select

or how do i handle multiple backgroundworker if non of this is possible with the backgroundworker, how do i do this using thread multithreading?