protected void PrintAll_Click(object sender, EventArgs e)
{
  // number of frames
  int number = _FaxPages.Count;


 // for loop to iterate through each frame
 for (int i = 0; i < number; i++)
  {
     // fax ID
     string _FaxId = Page.Request["FaxId"];

     //string _Frame = Page.Request["Frame"];

     // current frame
     _PageIndex = i;

     // IMG URL
     imgFax.ImageUrl = "ShowFax.ashx?n=" + _FaxId + "&f=" + _PageIndex + "&mw=750";



     PrintDocument pd = new PrintDocument();

     pd.PrintPage += PrintPage;
     pd.Print();

 }

private void PrintPage(object o, PrintPageEventArgs e)
{
   System.Drawing.Image img = System.Drawing.Image.FromFile(imgFax.ImageUrl);
   Point loc = new Point(100, 100);
   e.Graphics.DrawImage(img, loc);
}

static String[] SplitFile(String file_name)
{
    System.Drawing.Image imageFile = System.Drawing.Image.FromFile(file_name);
    System.Drawing.Imaging.FrameDimension frameDimensions = new System.Drawing.Imaging.FrameDimension(imageFile.FrameDimensionsList[0]);
    int NumberOfFrames = imageFile.GetFrameCount(frameDimensions);
    string[] paths = new string[NumberOfFrames];
    for (int intFrame = 0; intFrame < NumberOfFrames; ++intFrame)
    {
        imageFile.SelectActiveFrame(frameDimensions, intFrame);
        Bitmap bmp = new Bitmap(imageFile);
        paths[intFrame] = System.IO.Path.GetDirectoryName(Application.ExecutablePath) + @"" + intFrame.ToString() + ".tif";
        bmp.Save(paths[intFrame], System.Drawing.Imaging.ImageFormat.Tiff);
        bmp.Dispose();
    }
    imageFile.Dispose();
    return paths;
}