Scenario: In a Windows Forms application, you have a requirement to allow users to select multiple items from a ListBox control. How would you implement this feature?

  • Set the SelectionMode property of the ListBox control to MultiExtended or MultiSimple.
  • Use a CheckedListBox control instead of a ListBox control.
  • Handle the ListBox's ItemCheck event and maintain a collection of selected items manually.
  • Enable the MultiSelect property of the ListBox control.
Option 1 is the correct approach. Setting the SelectionMode property of the ListBox control to either MultiExtended or MultiSimple allows users to select multiple items by holding down the Ctrl key or dragging the mouse, respectively. This feature provides a straightforward way to implement multiple item selection in a Windows Forms application using standard ListBox controls.
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