'宣言 Public Overloads Function AddCollectionChange(Of TItem)( _ ByVal collection As ICollection(Of TItem), _ ByVal action As NotifyCollectionChangedAction, _ ByVal changedItem As TItem, _ ByVal index As Integer, _ Optional ByVal itemTypeDisplayName As String _ ) As UndoUnit
public UndoUnit AddCollectionChange<TItem>( ICollection<TItem> collection, NotifyCollectionChangedAction action, TItem changedItem, int index, string itemTypeDisplayName )