/// <summary>
        /// Opens the image stream to read. If the <paramref name="maxSize"/> is not null, it will
        /// also resize the image if it is larger than the max Size.
        /// </summary>
        /// <param name="image">The image to read.</param>
        /// <param name="maxSize">The optional maximum image's dimension.</param>
        /// <returns></returns>
        protected virtual Stream OpenRead(ImageQueue image, Size?maxSize = null)
        {
            var blobContainer = _blobService.Get(image.BlobUri);
            var blobStream    = blobContainer.GetDefault().OpenRead();

            if (!maxSize.HasValue)
            {
                return(blobStream);
            }
            return(EnsureMaxImageSize(blobStream, maxSize.Value, image));
        }
 protected virtual Stream EnsureMaxImageSize(Stream blobStream, Size maxSize, ImageQueue image)
 {
     using (var bitmap = Image.FromStream(blobStream))
     {
         // if the image's dimension if larger than max size, we resize it to:
         // save the bandwidth
         // and also to prevent any quota/litmitation error might have
         if (bitmap.Width > maxSize.Width || bitmap.Height > maxSize.Height)
         {
             double heightWidthRatio = ((double)bitmap.Height) / bitmap.Width;
             var    newSize          = new Size(maxSize.Width, Convert.ToInt32(maxSize.Width * heightWidthRatio));
             if (newSize.Height > maxSize.Height)
             {
                 newSize = new Size(Convert.ToInt32(maxSize.Height / heightWidthRatio), maxSize.Height);
             }
             var imageFormat = FileExtensions.GetImageFormat(_mimeExtensionHelper.FindMime(Path.GetExtension(image.FileName)), true);
             return(_imageResizer.Resize(newSize, true, blobStream, imageFormat).Result);
         }
         return(blobStream);
     }
 }