Capture area of picturebox

[dr_aybyd]

Hi I have a picturebox that has other controls over it like labe and textbox and other image over it.

But when I take capture of that area, and save it as .jpg it shows only white image and labels, text, image is not included.

Here is my code for capture

Rectangle form = this.pictureBox1.Bounds;
            using (Bitmap bitmap = new Bitmap(form.Width, form.Height))
            {
                using (Graphics graphic = Graphics.FromImage(bitmap))
                {
                   pictureBox1.DrawToBitmap(bitmap, new Rectangle(0, 0, this.pictureBox1.Width, this.pictureBox1.Height));   
                }
                bitmap.Save("D://test.jpg", ImageFormat.Bmp);
            }

What is the correct code to do that?
Thanks,