gdi error why?

public void AddNewTempImage(Stream image, string extension, Guid PageId, Guid ImageId,
            ImageTransformCollection toDoTransforms)
        {
            //mapping steam to memory stream so it does support the seek
            
            MemoryStream targetStream = new MemoryStream(ReadStream(image, 1024));
            Image ImageToTransform=null;
            Image transformedImage = null;
            string storagePath = ImageTransformManager.Config.StorageServerPhysicalPath;
      &nb ...