public static List <YearPayment> Calculate(List <LoanPayment> payments)
{
List <YearPayment> list = new List <YearPayment>();
YearPayment summPayment = null;
List <LoanPayment> .Enumerator enumerator = payments.GetEnumerator();
while (true)
{
LoanPayment payment = enumerator.MoveNext() ? enumerator.Current : null;
int year = payment == null ? 0 : payment.Month.Year;
if (payment == null || summPayment == null || summPayment.Year != year)
{
if (summPayment != null)
{
list.Add(summPayment);
}
summPayment = payment == null ? null : new YearPayment()
{
Year = year
};
}
if (payment == null)
{
break;
}
summPayment.Interest += payment.Interest;
summPayment.Principal += payment.Principal;
}
return(list);
}
public static List <LoanPayment> Calculate(double loanAmount, double interestRate, double months, DateTime startMonth, out double payment)
{
payment = (loanAmount * interestRate) / (1 - Math.Exp((-months) * Math.Log(1 + interestRate)));
payment = LoanPayment.Trunc2(payment);
List <LoanPayment> payments = new List <LoanPayment>();
double balance = loanAmount;
for (int i = 1; i <= (int)months; i++)
{
LoanPayment lp = new LoanPayment(balance, payment, i, interestRate, startMonth);
balance = lp.Balance;
payments.Add(lp);
if (lp.Balance <= 0)
{
break;
}
}
payments[payments.Count - 1].UpdateBalance();
return(payments);
}
