My page uses Web Form controls. I have a CheckBoxList which is populated dynamically in the Page_Load event. There is also a RadioButtonList which is populated statically. I have a SelectedIndexChanged event coded for the RadioButtonList. It will not be invoked unless AutoPostBack for the RadioButtonList is set to True. However, this also re-fires the Page_Load event again and ends up appending the same set of checkboxes to the CHeckBoxList. <BR><BR>How can I have the RadioButtonList_SelectedIndexChanged even fired without firing the Page_Load event? Or is there another way to dynamically populate my CheckBoxList on initial load of the page, but not on reloads from other server events.