title: Determining which checkbox is checked in a checkboxlist list
body: <p>I've a asp.net page which uses multi select checkboxlist(say having 10 checkboxes)....for example
  </p>
  
  <p>I've enabled AutoPostBack for any change in checkboxlist.</p>
  
  <p>Initially,out of 10, 3 are selected.
  On top of this, if user checks another checkbox, how do I know which particular checkbox has been checked by the user and retrieve its value?</p>
  
  <p>Thanks.</p>