gistfile1.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Imaging;
using System.IO;

namespace Screenie
{
    class Program
    {
        static string targetDir = Path.Combine(new string[] { Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "My Dropbox", "Public", "screens/" });
        // or a 'screens' folder under your personal dropbox public folder.
        [STAThread]
        static void Main(string[] args)
        {
            if (!Directory.Exists(targetDir))
                Directory.CreateDirectory(targetDir);
            for (int i = 0; i < Screen.AllScreens.Length; i++)
            {
                Screen screen = Screen.AllScreens[i];
                DateTime dt = DateTime.Now;
                string fileName = (Screen.AllScreens.Length > 1 ? ("[" + i + "]_") : "") + dt.Year.ToString("0000") + "_" + dt.Month.ToString("00") + "_" + dt.Day.ToString("00") + "_" + dt.Hour.ToString("00") + "_" + dt.Minute.ToString("00") + "_" + dt.Second.ToString("00") + ".png";
                using (Bitmap bmpScreenshot = new Bitmap(screen.Bounds.Width, screen.Bounds.Height, PixelFormat.Format32bppArgb))
                {
                    using (Graphics gfxScreenshot = Graphics.FromImage(bmpScreenshot))
                        gfxScreenshot.CopyFromScreen(screen.Bounds.X, screen.Bounds.Y, 0, 0, screen.Bounds.Size, CopyPixelOperation.SourceCopy);
                    bmpScreenshot.Save(Path.Combine(targetDir, fileName), ImageFormat.Png);
                }
                if (i == 0)
                    Clipboard.SetText("http://dl.dropbox.com/u/[YOUR DROPBOX ID]/screens/" + fileName);
            }
        }
    }
}