title: Checkboxlist latest checked/unchecked item
body: <p>I have a need to get the latest checked or unchecked item from a checkboxlist. Basically I need to detect any change in the list and perform some action on that. </p>
  
  <p>I found the solution for latest checked item but couldn't find one for the latest unchecked item. </p>
  
  <p>Is it possible to do that with the checkboxlist or I will have to go with another control?</p>