info about the code...

Bitmap bitmap = new Bitmap(imageToBeResized, imageWidth, imageHeight);//existing image Scaled to the specified size
                  System.IO.MemoryStream stream = new MemoryStream();   what this line do?
                  bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);what this line do?
                  stream.Position = 0;
                  //create a byte array to store the binary image data
             byte[] image = new byte[stream.Length+1];
              //set the binary data
              stream.Read(image, 0, image.Length);