System.Windows.Forms.ListView.ListViewItemCollection.IList C# (CSharp) Method

			int IList.Add (object item)
			{
				int result;
				ListViewItem li;

				if (owner != null && owner.VirtualMode)
					throw new InvalidOperationException ();

				if (item is ListViewItem) {
					li = (ListViewItem) item;
					if (list.Contains (li))
						throw new ArgumentException ("An item cannot be added more than once. To add an item again, you need to clone it.", "item");

					if (li.ListView != null && li.ListView != owner)
						throw new ArgumentException ("Cannot add or insert the item '" + li.Text + "' in more than one place. You must first remove it from its current location or clone it.", "item");
				}
				else
					li = new ListViewItem (item.ToString ());

				li.Owner = owner;
				
				
				result = list.Add (li);
				CollectionChanged (true);

				//UIA Framework event: Item Added
				OnUIACollectionChangedEvent (new CollectionChangeEventArgs (CollectionChangeAction.Add, li));

				return result;
			}