c sharp code

GetNoOfDaysInMonth
Function (dateTimeVar investmentPaidDate)

numberVar intDay := 1;

dateVar monthStartDate := CDate (Year (investmentPaidDate), Month (investmentPaidDate) ,1) ;
dateVar monthEndDate := CDate (Year (investmentPaidDate), (Month (investmentPaidDate))+1 ,1);
monthEndDate = DateAdd ("d", -1 , monthEndDate );

intDay = DateDiff ("d", monthStartDate , monthEndDate );

intDay;