Namespace System Namespace Collections Namespace Generic Interface IEnumerable ' Method Function GetEnumerator () As IEnumerator End Interface Interface IEnumerator Inherits IDisposable ' Methods Function MoveNext () As Boolean Sub Reset() ' Property Function Current () As T End Interface Class ICollection Implements IEnumerable Public ' Property Abstract Function Count() As Long Abstract Function IsReadOnly() As Boolean ' Methods Abstract Sub Add ( item As T ) Abstract Sub Clear () ' Abstract Function Contains ( item As T ) As Boolean ' Abstract Sub CopyTo (ByRef array As List, arrayIndex As Long ) Abstract Function Remove ( item As T ) As Boolean End Class Class IList Inherits ICollection Public ' Property Abstract Sub Operator[] ( index As Long, item As T ) Abstract Function Operator[] ( index As Long ) As T ' Methods Abstract Function IndexOf ( item As T ) As Long Abstract Sub Insert ( index As Long, item As T ) Abstract Sub RemoveAt( index As Long ) End Class Namespace Details Interface ICollection ' Property Function Count() As Long '/*Const*/ Function IsSynchronized() As Boolean ' Function SyncRoot() As ... End Interface End Namespace End Namespace End Namespace End Namespace