System.Windows.Forms.ListView.SelectedIndexCollection.Add C# (CSharp) Method

			public int Add (int itemIndex)
			{
				if (itemIndex < 0 || itemIndex >= owner.Items.Count)
					throw new ArgumentOutOfRangeException ("index");

				if (owner.virtual_mode && !owner.is_selection_available)
					return -1;

				owner.Items [itemIndex].Selected = true;

				if (!owner.is_selection_available)
					return 0;

				return List.Count;
			}