Get the item a user unselects in a ASP CheckBoxList
<p>I expected this to be fairly straightforward but I cannot find/figure out a simple/smart solution.</p>

<p>I have a CheckBoxList and it has an OnSelectedIndexChanged event. If a user selects (checks) an item in the box then the event if fired and the code behind is executed. Simple.</p>

<p>Now if a user unchecks a box I need to do some work in the background but the problem is that when the user then deselects an item in the list it fires the event but in the code benind the event the list retains no pointer to which item the user just deselected. I find this strange and think I must be missing something obvious though various searches have yielded nothing concrete.</p>

<p>I guess i could maintain a list in the code behind of the items checked and everytime the event is fired figure out what has been deleted but this seems overkill if there is a simpler solution.</p>

<p>Thanks,
Michael </p>
