'宣言 Public Overloads Function AddCollectionChange(Of TItem)( _ ByVal collection As ICollection(Of TItem), _ ByVal changeArgs As NotifyCollectionChangedEventArgs, _ Optional ByVal itemTypeDisplayName As String _ ) As UndoUnit
public UndoUnit AddCollectionChange<TItem>( ICollection<TItem> collection, NotifyCollectionChangedEventArgs changeArgs, string itemTypeDisplayName )