Image not saving new dimensions after resize using xamarin c#

I am only posting here because it wont allow me to post in the other forums.

i am taking a photo with my app then rotating if needed then resizing. after that i am saving the new rotated and scaled down pic to the sd card. the photo does rotate and the byte size changes but when i view the new photo it still has the same dimensions as the orginal photo.

my resizing and saving calls are

Code:

---

                    //resize for preview
                    using (var bitmap = _file.Path.LoadAndResizeBitmap(300, 225))
                    {
                        //resize for saving
                        Bitmap resized = _file.Path.LoadAndResizeBitmap(800, 600);

                        BitmapHelpers.saveBitmap(resized,_user_id,_dateStr);

                        //shows preview resize
                        photo.SetImageBitmap(ConvertToBitmap(bitmap));

                    }


        public static Bitmap LoadAndResizeBitmap(this string fileName, int width, int height)
        {
            //First we get the diamensions of the file on disk
            BitmapFactory.Options options = new BitmapFactory.Options { InJustDecodeBounds = true };
            BitmapFactory.DecodeFile(fileName, options);

            //Next we calculate the ratio that we need to resize the image by
            //in order to fit the requested dimensions.
            int outHeight = options.OutHeight;
            int outWidth = options.OutWidth;
            int inSampleSize = 1;

            if (outHeight > height || outWidth > width)
            {
                inSampleSize = outWidth > outHeight
                    ? outHeight / height : outWidth / width;
            }

            //Now we will load the image
            options.InSampleSize = inSampleSize;
            options.InJustDecodeBounds = false;
            Bitmap resizedBitmap = BitmapFactory.DecodeFile(fileName, options);

            // Images are being saved in landscape, so rotate them back to portrait if they were taken in portrait
            Matrix mtx = new Matrix();
            Android.Media.ExifInterface exif = new Android.Media.ExifInterface(fileName);
            string orientation = exif.GetAttribute(Android.Media.ExifInterface.TagOrientation);

            switch (orientation)
            {
                case "6": // portrait
                    mtx.PreRotate(90);
                    resizedBitmap = Bitmap.CreateBitmap(resizedBitmap, 0, 0, resizedBitmap.Width, resizedBitmap.Height, mtx, false);
                    mtx.Dispose();
                    mtx = null;
                    break;
                case "1": // landscape
                    //mtx.PreRotate(-90);
                    //resizedBitmap = Bitmap.CreateBitmap(resizedBitmap, 0, 0, resizedBitmap.Width, resizedBitmap.Height, mtx, false);
                    //mtx.Dispose();
                    //mtx = null;
                    break;
                default:
                    mtx.PreRotate(90);
                    resizedBitmap = Bitmap.CreateBitmap(resizedBitmap, 0, 0, resizedBitmap.Width, resizedBitmap.Height, mtx, false);
                    mtx.Dispose();
                    mtx = null;
                    break;
            }
                    return resizedBitmap;
        }


        public static void saveBitmap(Bitmap bitmap, int userId, String dateStr)
        {

            var sdCardPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
            String fileName = "bb_" + userId + "_" + dateStr + "_new.jpg";
            var filePath = System.IO.Path.Combine(sdCardPath, fileName);
            var stream = new FileStream(filePath, FileMode.Create);
            bitmap.Compress(Bitmap.CompressFormat.Jpeg, 100, stream);
            stream.Close();

        }

---

when it does the first _file.Path.LoadAndResizeBitmap(300, 225) the inSampleSize is 3 and returns new height,width of 640,360
when it does _file.Path.LoadAndResizeBitmap(800, 600) the inSampleSize is 1 and returns original values of 1280,720

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