using System;

​

public class Loan

{

    public double CalculateMonthlyPayment(double loanAmount, int duration, double interestRate)

    {

        double monthlyPayment = 0;

        double monthlyInterestRate = interestRate / (100 * 12);

        monthlyPayment = loanAmount * Math.Pow(monthlyInterestRate * (1 + monthlyInterestRate), Convert.ToDouble(duration)) / (Math.Pow(1 + monthlyInterestRate, Convert.ToDouble(duration - 1)));

        return monthlyPayment;

    }

}