public void ResizeImage(string OrigFile, string NewFile, int NewWidth, int MaxHeight, bool ResizeIfWider)
{
        System.Drawing.Image FullSizeImage = System.Drawing.Image.FromFile(OrigFile);
        // Ensure the generated thumbnail is not being used by rotating it 360 degrees
        FullSizeImage.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipNone);
        FullSizeImage.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipNone);
 
        if (ResizeIfWider)
        {
                if (FullSizeImage.Width <= NewWidth)
                {
                        NewWidth = FullSizeImage.Width;
                }
        }
 
        int NewHeight = FullSizeImage.Height * NewWidth / FullSizeImage.Width;
        if (NewHeight > MaxHeight) // Height resize if necessary
        {
                NewWidth = FullSizeImage.Width * MaxHeight / FullSizeImage.Height;
                NewHeight = MaxHeight;
        }
 
        // Create the new image with the sizes we've calculated
        System.Drawing.Image NewImage = FullSizeImage.GetThumbnailImage(NewWidth, NewHeight, null, IntPtr.Zero);
        FullSizeImage.Dispose();
        NewImage.Save(NewFile);
}