This collection class represents the set of selected objects in a ListBox.

public class ListBox.SelectedObjectCollection : IList, ICollection, IEnumerable {
// Public Constructors
   public ListBox.SelectedObjectCollection(ListBox owner);
// Public Instance Properties
   public int Count{get; }
// implements ICollection
   public bool IsReadOnly{get; }
// implements IList
   public object this{set; get; }
// implements IList
// Public Instance Methods
   public bool Contains(object selectedObject);  // implements IList
   public void CopyTo(Array dest, int index);  // implements ICollection
   public IEnumerator GetEnumerator();  // implements IEnumerable
   public int IndexOf(object selectedObject);  // implements IList
}