C# Calc loan interest total

Needs: Loantable function to display an amortization schedule that include:

number of the cycle, payment amount, principal paid, interest paid, total interest paid, balance

Everything else works, but the TotalInterestPaid is not calculating and showing a running total. (this is the seperate loan class)

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Loan_Program

{

class Loan

{

//declare variables

private double LoanAmount, InterestRate;

private int LoanLength;

//Constructor of Loan class that takes amount, rate and years

public Loan(double amount, double rate, int years)

{

this.LoanAmount = amount;

this.InterestRate = (rate / 100.0) / 12.0;

this.LoanLength = years;

}

//returns the monnthly payment

public double GetMonthlyPayment()

{

int months = LoanLength * 12;

return (LoanAmount * InterestRate * Math.Pow(1 + InterestRate, months)) / (Math.Pow(1 + InterestRate, months) - 1);

}

//Returns the total intereest paid

public double TotalInterestPaid()

{

double interest = LoanAmount * InterestRate;

double total = 0;

for (int month = 1; month <= LoanLength * 12; month++)

total += interest;

return total;

}

//prints the amortization of Loan

public void LoanTable()

{

double monthlyPayment = GetMonthlyPayment();

double principalPaid = 0;

double newBalance = 0;

double interestPaid = 0;

double principal = LoanAmount; ;

double totalinterest = TotalInterestPaid();

//nonth, payment amount, principal paid, interest paid, total interest paid, balance

Console.WriteLine("{0,-10}{1,-10}{2,-10}{3,-10}{4,-10}{5,-10}", "Month", "payment", "Interest Paid", "Principal paid","Balance","Total Interest");

for (int month = 1; month <= LoanLength * 12; month++)

{

// Compute amount paid and new balance for each payment period

interestPaid = principal * InterestRate;

principalPaid = monthlyPayment - interestPaid;

newBalance = principal - principalPaid;

totalinterest = TotalInterestPaid(interestPaid);

// Output the data item

Console.WriteLine("{0,-7}{1,10:N2}{2,10:N2}{3,10:N2}{4,15:N2}{5,15:N2}",

month, monthlyPayment, interestPaid, principalPaid, newBalance, totalinterest);

// Update the balance

principal = newBalance;

}

}

}

}