'宣言 Public Overloads Overridable Function CreateCollectionChange(Of T)( _ ByVal collection As ICollection(Of T), _ ByVal item As T, _ ByVal oldIndex As Integer, _ ByVal newIndex As Integer, _ ByVal itemTypeDisplayName As String _ ) As UndoUnit
public virtual UndoUnit CreateCollectionChange<T>( ICollection<T> collection, T item, int oldIndex, int newIndex, string itemTypeDisplayName )