using System;
using System.Windows.Forms;

namespace TaxCalculator
{
  public partial class Form1 : Form
  {
    public Form1()
    {
        InitializeComponent();
    }
    
    private void btnCompute_Click(object sender, EventArgs e)
    {
      double balance;                   
      double capital = Convert.ToDouble(tbCapital.Text);   // Inläsning från
      double taxRate = Convert.ToDouble(tbTaxRate.Text);   // textboxarna
      int years      = Convert.ToInt32(numUpDownYear.Value);

      double FF = 1 + taxRate / 100;                       // Förändringsfaktor
      string output = "År\t\tSaldo\r\n\r\n";               // Utskriftsvariabel

      for (int n = 1; n <= years; n++)
      {
         balance = capital * (Math.Pow(FF, n));
         output += n + "\t\t" + string.Format("{0:C}", balance) + "\r\n";
      }                              // Formaterad utskrift, C = Currency

      tbDisplay.Text = output;       // Akkumulerad utskrift dumpas till multi-
    }                                                          // line textbox
  }
}