Can't read image bytes from stream ("Reading would overrun buffer")

Hi, I'm trying to implement picture on profile page in my app, so I'm using Xamarin Labs for MediaPicker, to take or select images, and then using Image Resizer, I call resize after getting picture from MediaPicker, and get System.ArgumentException: Reading would overrun buffer on read bytes from stream.

here is what I'm trying to do:

    private byte[] GetResizedImage(Stream str, int screenWidth, int screenHeight)
        {
        var array = new byte[] {};
        str.Position = 0;
        str.Read(array, 0, (int)str.Length - 1); // **EXCEPTION HERE**
        if (ImageResizer == null)
            return array;
        try
        {
            return ImageResizer.ResizeImage(array, screenWidth, screenHeight);
        }
        catch (Exception)
        {
            return array;
        }
    }


    private async Task SelectPicture()
    {

        mediaPicker = DependencyService.Get<IMediaPicker>();

        imageSource = null;

            var mediaFile = await mediaPicker.SelectPhotoAsync(new CameraMediaStorageOptions
            {
                    DefaultCamera = CameraDevice.Front,
                            MaxPixelDimension = 1,
                                PercentQuality = 2,
                    });
            var image = GetResizedImage(mediaFile.Source, 1024, 400);

            myImage.Source = ImageSource.FromStream(() => new MemoryStream(image)); ;
            profileButton.Source = ImageSource.FromStream(() => new MemoryStream(image));
    }

does anyone know how to fix this?