This property is only useful when the ListView.CheckBoxes property of the System.Windows.Forms.ListView control is set to true. The ListView.CheckedIndices property returns a collection that contains the index positions in the System.Windows.Forms.ListView.ListViewItemCollection of 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.CheckedIndexCollection.

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