System.Windows.Forms.ListBox.ObjectCollection.AddItem C# (CSharp) Method

			internal int AddItem (object item)
			{
				if (item == null)
					throw new ArgumentNullException ("item");

				int cnt = object_items.Count;
				object_items.Add (item);

#if NET_2_0
				//UIA Framework event: Item Added
				OnUIACollectionChangedEvent (new CollectionChangeEventArgs (CollectionChangeAction.Add, item));
#endif

				return cnt;
			}