This property is only useful when the ListView.CheckBoxes property of the System.Windows.Forms.ListView control is set to true. The ListView.CheckedItems property returns a collection that contains all items that are checked in the control. For more information about how to manipulate the items in the collection, see System.Windows.Forms.ListView.CheckedListViewItemCollection.

If you want to obtain a collection of the index positions within the System.Windows.Forms.ListView.ListViewItemCollection of the items that are checked in the System.Windows.Forms.ListView control, instead of the items that are checked, use the ListView.CheckedIndices property.