How to view documents through buffer memory in WPF

public void updateImage()
{
imagearray // The memory which i get from c++
SlectedImage.Source = LoadImage(imagearray);//set the source Image to the Image controll
}



 public static BitmapImage LoadImage(byte[] imageData)
        {
            if (imageData == null || imageData.Length == 0) return null;
            var image = new BitmapImage();

           
                using (var mem = new MemoryStream(imageData))
                {
                    mem.Position = 0;
                    image.BeginInit();
                    image.CreateOptions = BitmapCreateOptions.PreservePixelFormat;
                    image.CacheOption = BitmapCacheOption.OnLoad;
                    image.UriSource = null;
                    image.StreamSource = mem;
                    image.EndInit();

                }


                image.Freeze();
return image

}