Re size image or Generate Thumbnail in asp.net

Code for  re size image in asp.net, It also maintain the aspect ratio and image quality.

private void GenerateThumbnail(byte[] byteArray, int thumbnailSize)

        {

            // Convert byte array into stream

            Stream fStream = new MemoryStream(byteArray);

            Bitmap photo = new Bitmap(fStream);

            // maintain aspect ratio

            int width, height;

            if (photo.Width > photo.Height)

            {

                width = thumbnailSize;

                height = photo.Height * thumbnailSize / photo.Width;

            }

            else

            {

                width = photo.Width * thumbnailSize / photo.Height;

                height = thumbnailSize;

            }

            Size resizeImageSize = new Size(width, height);

            System.Drawing.Image img = System.Drawing.Image.FromStream(fStream);

            System.Drawing.Image thumbnailImage = img.GetThumbnailImage(resizeImageSize.Width, resizeImageSize.Height, null, IntPtr.Zero);

            // use high quality conversion

            using (Graphics graphic = Graphics.FromImage(thumbnailImage))

            {

                graphic.CompositingQuality = CompositingQuality.HighQuality;

                graphic.SmoothingMode = SmoothingMode.HighQuality;

                graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;

                Rectangle rect = new Rectangle(0, 0, resizeImageSize.Width, resizeImageSize.Height);

                graphic.DrawImage(thumbnailImage, rect);

                using (MemoryStream imageStream = new MemoryStream())

                {

                    thumbnailImage.Save(imageStream, System.Drawing.Imaging.ImageFormat.Jpeg);

                    // convert back into byte array

                    byte[] imageContent = new Byte[imageStream.Length];

                    imageStream.Position = 0;

                    imageStream.Read(imageContent, 0, (int)imageStream.Length);

                   

                    context.Response.ContentType = "image/jpeg";

                    context.Response.OutputStream.Write(imageContent, 0, imageContent.Length);

                }

            }

        }