By default, the CloseOnClick property is True. Use the CloseOnClick property to disable closing the drop down portion of the control when user clicks an item. Use the CloseOnDblClk property to specify whether the user closes the drop down portion of the control when user double clicks an item in the control. The control fires the SelectionChanged event when the user clicks a new item. The control fires the DblClick event when user double clicks an item. The CloseOnClick property has effect only if the Style property is DropDown or DropDownList. The CloseOnDblClk property is set on False, if the CloseOnClick property is set on True.