Hello,

I'm trying to write a method to reduce the size of any image 50% each time is called but I've found a problem. Sometimes, I end up with a bigger filesize while the image is really just half of what it was. I'm taking care of DPI and PixelFormat. What else am I missing?

Thank you for your time.

public Bitmap ResizeBitmap(Bitmap origBitmap, int nWidth, int nHeight)
{
    Bitmap newBitmap = new Bitmap(nWidth, nHeight, origBitmap.PixelFormat);
    newBitmap.SetResolution(origBitmap.HorizontalResolution, origBitmap.VerticalResolution);
    using (Graphics g = Graphics.FromImage((Image)newBitmap))
    {
        g.InterpolationMode = InterpolationMode.HighQualityBicubic;
        g.DrawImage(origBitmap, 0, 0, nWidth, nHeight);
    }
    return newBitmap;
}