Array
(
    [dirname] => .
    [basename] => frmFutureValue.cs
    [extension] => cs
    [filename] => frmFutureValue
)
1. file=./frmFutureValue.cs<br>
2. file=.//frmFutureValue.cs<br>
3. file=frmFutureValue.cs<br>
<?php // Save this file as: ./frmFutureValue.cs ?>
namespace FutureValue
{
    public partial class frmFutureValue : Form
    {
        public frmFutureValue()
        {
            InitializeComponent();
        }

        private void btnCalculate_Click(object sender, EventArgs e)
        {
            try
            {
                decimal monthlyInvestment = Convert.ToDecimal(txtMonthlyInvestment.Text);
                decimal yearlyInterestRate = Convert.ToDecimal(txtInterestRate.Text);
                int years = Convert.ToInt32(txtYears.Text);

                int months = years * 12;
                decimal monthlyInterestRate = yearlyInterestRate / 12 / 100;

                decimal futureValue = CalculateFutureValue(monthlyInvestment, months, monthlyInterestRate);

                txtFutureValue.Text = futureValue.ToString("c");
                txtMonthlyInvestment.Focus();

            }
            catch(FormatException)
            {
                MessageBox.Show("Invalid numeric format. Please check all entries.", "Entry Error");
            }
            catch(OverflowException)
            {
                MessageBox.Show("Overflow error. Please enter smaller values.", "Entry Error");
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message, ex.GetType().ToString());
            }
        }

        private static decimal CalculateFutureValue(decimal monthlyInvestment, int months, decimal monthlyInterestRate)
        {
            decimal futureValue = 0m;
            for (int i = 0; i < months; i++)
            {
                futureValue = (futureValue + monthlyInvestment)
                            * (1 + monthlyInterestRate);
            }

            return futureValue;
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}