C#

private void btnCalculate_Click(object sender, EventArgs e)
      {
          // Validates user inputted data and calculates the value at the end of each year
          // displayed in multiline textbox
          double dblPresentValue = 0;
          double dblSalvageValue = 0;
          int intYearsOfDepreciation = 0;
          int intCounter = 0;
          string strDisplay = "";

          // Clear any text already in display
          txtDisplay.Text = "";

          // Get values from text boxes
          dblPresentValue = Convert.ToDouble(txtPresentValue.Text);
          dblSalvageValue = Convert.ToDouble(txtSalvageValue.Text);
          intYearsOfDepreciation = Convert.ToInt32(txtYearsOfDepreciation.Text);

          // Validate user entry
          if (dblPresentValue < 1 | dblPresentValue > 1000000)
          {
              MessageBox.Show("Present value must be between $1 and $1,000,000");
              txtPresentValue.Select(); //selects defective input text box
              txtPresentValue.SelectAll();
          }
          else if (dblSalvageValue > dblPresentValue)
          {
              MessageBox.Show("Salvage value cannot be greater than Present Value");
              txtSalvageValue.Select(); //selects defective input text box
              txtSalvageValue.SelectAll();
          }
          else if (intYearsOfDepreciation < 0 | intYearsOfDepreciation > 25)
          {
              MessageBox.Show("Years of Depreciation must be in 1 - 25 range");
              txtYearsOfDepreciation.Select(); //selects defective input text box
              txtYearsOfDepreciation.SelectAll();
          }
          else
          {
              // set up column headers in text display
              strDisplay = "Year      Asset Value\r\n-------      ---------------";
              // pre-test loop + calcuate + display as currency
              double period = (dblPresentValue - dblSalvageValue)/intYearsOfDepreciation;

              int curYear = DateTime.Now.Year;
              while (intCounter < intYearsOfDepreciation) //loop control statement
              {
                  strDisplay += "\r\n"+ curYear.ToString() + ": " + dblPresentValue.ToString("C2");
                  intCounter = intCounter + 1;
                  dblPresentValue -= period;
                  curYear++;
              }
              txtDisplay.Text = strDisplay;

          }


      }

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.IO;
 using System.Windows.Forms;
using System.Data.SqlClient;
using Microsoft.Reporting.WinForms;

namespace POS_System_Inventory
{
     public static class LocalReportExtensions
    {
        public static void PrintToPrinter(this LocalReport report)
        {
            PageSettings pageSettings = new PageSettings();
            pageSettings.PaperSize = report.GetDefaultPageSettings().PaperSize;
            pageSettings.Landscape = report.GetDefaultPageSettings().IsLandscape;
            pageSettings.Margins = report.GetDefaultPageSettings().Margins;
            Print(report, pageSettings);
        }
         

        public static void Print(this LocalReport report, PageSettings pageSettings)
        {
            string deviceInfo =
                @"<DeviceInfo>
                    <OutputFormat>EMF</OutputFormat>
                    <PageWidth>{pageSettings.PaperSize.Width * 100}in</PageWidth>
                    <PageHeight>{pageSettings.PaperSize.Height * 100}in</PageHeight>
                    <MarginTop>{pageSettings.Margins.Top * 100}in</MarginTop>
                    <MarginLeft>{pageSettings.Margins.Left * 100}in</MarginLeft>
                    <MarginRight>{pageSettings.Margins.Right * 100}in</MarginRight>
                    <MarginBottom>{pageSettings.Margins.Bottom * 100}in</MarginBottom>
                </DeviceInfo>";
            Warning[] warnings;
            var streams = new List<Stream>();
            var pageIndex = 0;
            report.Render("Image", deviceInfo,
                (name, fileNameExtension, encoding, mimeType, willSeek) =>
                {
                    MemoryStream stream = new MemoryStream();
                    streams.Add(stream);
                    return stream;
                }, out warnings);
            foreach (Stream stream in streams)
                stream.Position = 0;
            if (streams == null || streams.Count == 0)
                throw new Exception("Aucun flux à imprimer.");
            using (PrintDocument printDocument = new PrintDocument())
            {
                printDocument.DefaultPageSettings = pageSettings;
                if (!printDocument.PrinterSettings.IsValid)
                    throw new Exception("Impossible de trouver l'imprimante par défaut.");
                else
                {
                    printDocument.PrintPage += (sender, e) =>
                    {
                        Metafile pageImage = new Metafile(streams[pageIndex]);
                        Rectangle adjustedRect = new Rectangle(e.PageBounds.Left - (int)e.PageSettings.HardMarginX, e.PageBounds.Top - (int)e.PageSettings.HardMarginY, e.PageBounds.Width, e.PageBounds.Height);
                        e.Graphics.FillRectangle(Brushes.White, adjustedRect);
                        e.Graphics.DrawImage(pageImage, adjustedRect);
                        pageIndex++;
                        e.HasMorePages = (pageIndex < streams.Count);
                        e.Graphics.DrawRectangle(Pens.Red, adjustedRect);
                    };
                    printDocument.EndPrint += (Sender, e) =>
                    {
                        if (streams != null)
                        {
                            foreach (Stream stream in streams)
                                stream.Close();
                            streams = null;
                        }
                    };
                    printDocument.Print();
                }
            }
        }
    }
}

namespace StraightlineDepreciationCalculator
{
    public partial class frmStraightlinedDepreciationCalculator : Form
    {
        public frmStraightlinedDepreciationCalculator()
        {
            InitializeComponent();
        }

        private void btnClear_Click(object sender, EventArgs e)
        {
            // Clears text boxes and selects first tab in form
            txtPresentValue.Text = "";
            txtSalvageValue.Text = "";
            txtYearsOfDepreciation.Text = "";
            txtDisplay.Text = "";
            txtPresentValue.SelectAll();
            txtPresentValue.Select();

        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            // This function confirms and exits the application
            DialogResult dlgresult;
            dlgresult = MessageBox.Show("Do you want to exit the application?", "Close the form", MessageBoxButtons.YesNo);
            if (dlgresult == DialogResult.Yes)
            {
                //Closes the application
                System.Environment.Exit(1);
            }
            else
            {
                txtPresentValue.Select();
            }
        }

        private void btnCalculate_Click(object sender, EventArgs e)
        {
            // Validates user inputted data and calculates the value at the end of each year
            // displayed in multiline textbox
            double dblPresentValue = 0;
            double dblSalvageValue = 0;
            int intYearsOfDepreciation = 0;
            int intCounter = 0;
            string strDisplay = "";

            // Clear any text already in display
            txtDisplay.Text = "";

            // Get values from text boxes
            dblPresentValue = Convert.ToDouble(txtPresentValue.Text);
            dblSalvageValue = Convert.ToDouble(txtSalvageValue.Text);
            intYearsOfDepreciation = Convert.ToInt32(txtYearsOfDepreciation.Text);

            // Validate user entry
            if (dblPresentValue < 1 | dblPresentValue > 1000000)
            {
                MessageBox.Show("Present value must be between $1 and $1,000,000");
                txtPresentValue.Select(); //selects defective input text box
                txtPresentValue.SelectAll();
            }
            else if (dblSalvageValue > dblPresentValue)
            {
                MessageBox.Show("Salvage value cannot be greater than Present Value");
                txtSalvageValue.Select(); //selects defective input text box
                txtSalvageValue.SelectAll();
            }
            else if (intYearsOfDepreciation < 0 | intYearsOfDepreciation > 25)
            {
                MessageBox.Show("Years of Depreciation must be in 1 - 25 range");
                txtYearsOfDepreciation.Select(); //selects defective input text box
                txtYearsOfDepreciation.SelectAll();
            }
            else
            {
                // set up column headers in text display
                strDisplay = "Year      Asset Value/r/n-------      ---------------";

            }
                

        }
    }
}