public static double Yearfrac(
	DateTime startDate,
	DateTime endDate,
	DayCountBasis basis
)

Public Shared Function Yearfrac ( 
	startDate As DateTime,
	endDate As DateTime,
	basis As DayCountBasis
) As Double

public:
static double Yearfrac(
	DateTime startDate, 
	DateTime endDate, 
	DayCountBasis^ basis
)

static member Yearfrac : 
        startDate : DateTime * 
        endDate : DateTime * 
        basis : DayCountBasis -> float