void Add(
	Object Item,
	string Key = "<<no-key>>",
	Object Before = null,
	Object After = null
)

Sub Add ( 
	Item As Object,
	Optional Key As String = "<<no-key>>",
	Optional Before As Object = Nothing,
	Optional After As Object = Nothing
)

void Add(
	Object^ Item, 
	String^ Key = L"<<no-key>>", 
	Object^ Before = nullptr, 
	Object^ After = nullptr
)

function Add(Item, Key, Before, After);