// First Installment always occurs on PaymentPlan creation date
private void InitializeInstallments()
{
for (int interval = 0; interval < InstallmentCount; interval++)
{
Installments.Add(new Installment(OriginationDate.AddDays(interval * InstallmentIntervalDays), InstallmentAmount));
}
Installments.OrderBy(i => i.Date);
}
public Installment FirstInstallment()
{
if (!Installments.Any())
{
throw new ApplicationException($"No Installments for Payment Plan Id {Id.ToString()}");
}
return(Installments.OrderBy(i => i.Date).FirstOrDefault());
}