Create Blended Image

CreateBlendedImage

        private static Image CreateBlendedImage(string backgroundimageurl)
        {
            Image imageBackground;
            Image imageOverlay;
            
            var request = WebRequest.Create(backgroundimageurl);
            using (var response = request.GetResponse())
            using (var stream = response.GetResponseStream())
            {
                imageBackground = Bitmap.FromStream(stream);
            }
            
            var request2 = WebRequest.Create("http://c1.staticflickr.com/1/286/19041020628_2657a057cc_k.jpg"); //Rainbow Flag
            using (var response2 = request2.GetResponse())
            using (var stream2 = response2.GetResponseStream())
            {
                imageOverlay = Bitmap.FromStream(stream2);
            }

            imageOverlay = ChangeOpacity(imageOverlay, 0.5F);
            imageOverlay = ScaleImage(imageOverlay, imageBackground.Width, imageBackground.Height);
            imageOverlay = imageOverlay.GetThumbnailImage(imageBackground.Width, imageBackground.Height, null, IntPtr.Zero);

            Image img = new Bitmap(imageBackground.Width, imageBackground.Height);
            using (Graphics gr = Graphics.FromImage(img))
            {
                gr.DrawImage(imageBackground, new Point(0, 0));
                gr.DrawImage(imageOverlay, new Point(0, 0));
            }
            return img;
        }