System.Windows.Forms.ListBox.OnDataSourceChanged C# (CSharp) Method

		protected override void OnDataSourceChanged (EventArgs e)
		{
			base.OnDataSourceChanged (e);
			BindDataItems ();
			
			if (DataSource == null || DataManager == null) {
				SelectedIndex = -1;
			} else {
				SelectedIndex = DataManager.Position;
			}
		}