C# Picture Viewer

It still amazes me how fast you can create a working example, and how little code it takes to get something going with .Net. I created a simple jpg picture viewer while I was watching "Everybody Loves Raymond" repeats on the TV. Heres the code I had to add for the application to work: (Ok, what's the trick for getting the C# style/formatting to show up in a blog? Anybody?)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace formsStuff
{
    public partial class Form2 : Form
    {
        private int fileIndex;
        private DirectoryInfo dir;
        private FileInfo[] files;
        private string pictureDir;
        
        public Form2()
        {
            InitializeComponent();
            fileIndex = 0;
            pictureDir = 
               @"C:\Users\Public\Pictures\Sample Pictures";
            dir = new DirectoryInfo(pictureDir);
            files = dir.GetFiles("*.jpg");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            fileIndex++;
            if (fileIndex >= files.Length) 
               fileIndex = files.Length - 1;

            ShowPicture(fileIndex);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            fileIndex--;
            if (fileIndex <= 0) fileIndex = 0; 

            ShowPicture(fileIndex);
        }

        private void ShowPicture(int index)
        {
            mainPictureBox.Load(files[index].FullName);
        }
    }
}

No property name mods were done, because the defaults were sufficient for this example. The mainPictureBox member is a PictureBox component. And there are 3 Buttons. Two of the buttons advance the Picture being viewed forward and backward using a fileIndex. Basically, progressing through the pics 1 at a time. The other button exits the application. The directory info member and the array of files use is obvious in the example. Quick and simple, and you have a photo viewer that you can scroll through. It is so fast to create with .Net.