This class is a System.Drawing.Design.UITypeEditor that provides a graphical interface for adding list items and configuring their properties at design time. It's used to configure the Items property for controls such as System.Web.UI.WebControls.CheckBoxList, System.Web.UI.WebControls.RadioButtonList, and System.Web.UI.WebControls.ListBox.
public class ListItemsCollectionEditor : System.ComponentModel.Design.CollectionEditor { // Public Constructors public ListItemsCollectionEditor(Type type); // Protected Instance Methods protected override bool CanSelectMultipleInstances( ); // overrides System.ComponentModel.Design.CollectionEditor }