public void Open(
	string portName,
	int baudRate = 9600
)

Public Sub Open ( 
	portName As String,
	Optional baudRate As Integer = 9600
)

public:
void Open(
	String^ portName, 
	int baudRate = 9600
)

member Open : 
        portName : string * 
        ?baudRate : int 
(* Defaults:
        let _baudRate = defaultArg baudRate 9600
*)
-> unit