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

			public virtual object this [int index] {
				get {
					if (index < 0 || index >= Count)
						throw new ArgumentOutOfRangeException ("Index of out range");

					return object_items[index];
				}
				set {
					if (index < 0 || index >= Count)
						throw new ArgumentOutOfRangeException ("Index of out range");
					if (value == null)
						throw new ArgumentNullException ("value");
						
#if NET_2_0
					//UIA Framework event: Item Removed
					OnUIACollectionChangedEvent (new CollectionChangeEventArgs (CollectionChangeAction.Remove, object_items [index]));
#endif

					object_items[index] = value;
					
#if NET_2_0
					//UIA Framework event: Item Added
					OnUIACollectionChangedEvent (new CollectionChangeEventArgs (CollectionChangeAction.Add, value));
#endif					

					owner.CollectionChanged ();
				}
			}