public Importo(
	double val,
	frequenza freq,
	bool is_netto
)

Public Sub New ( 
	val As Double,
	freq As frequenza,
	is_netto As Boolean
)

public:
Importo(
	double val, 
	frequenza freq, 
	bool is_netto
)

new : 
        val : float * 
        freq : frequenza * 
        is_netto : bool -> Importo