Привет

есть такой код

using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.IO.Compression;
using System.Windows.Forms;

namespace TestImageTypeSize
{
  class Program
  {
    static void Main()
    {
      ImageFormat[ ] formats = new[ ] { ImageFormat.Gif, ImageFormat.Jpeg, ImageFormat.Png };

      int screenId = 0;
      foreach (Screen screen in Screen.AllScreens)
      {
        Bitmap bmp = new Bitmap(screen.Bounds.Width, screen.Bounds.Height);
        Graphics g = Graphics.FromImage(bmp);

        g.CopyFromScreen(screen.Bounds.X, screen.Bounds.Y, 0, 0, new Size(screen.Bounds.Width, screen.Bounds.Height));

        foreach (ImageFormat format in formats)
        {
          string filename = @"t:\screen_" + screenId + "." + format;

          bmp.Save(filename, format);

          FileStream fileStream = new FileStream(filename + ".zip", FileMode.Create, FileAccess.ReadWrite);
          GZipStream gZipStream = new GZipStream(fileStream, CompressionMode.Compress);
          bmp.Save(gZipStream, format);
          gZipStream.Close();
        }

        screenId++;
      }
    }
  }
}

который падает в строке

bmp.Save(gZipStream, format);

с ошибкой

A generic error occurred in GDI+

используется VS2008 Team Ed, .NET 3.5 Sp1 на Win XP SP3

в чем ошибка?

Спасибо