AForge.Imaging.UnmanagedImage.ToManagedImage C# (CSharp) Method

        public Bitmap ToManagedImage( )
        {
            return ToManagedImage( true );
        }

        private void BtnLoadimage_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog
            {
                Multiselect = true,
                Filter      = "Image files (*.png;*.jpeg;*.bmp)|*.png;*.jpeg;*.bmp|All files (*.*)|*.*",
                //openFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
                //InitialDirectory = "C:\\Users\\BrianWang\\Desktop\\English Muffin Scan\\Dec 1 2017"
                InitialDirectory = "C:\\Users\\kai23\\Projects\\ABI\\EnglishMuffinVision_AForge\\Images\\English Muffin\\Batch 1\\All Top"
            };

            if (openFileDialog.ShowDialog() == true)
            {
                foreach (string filename in openFileDialog.FileNames)
                {
                    lblfilename.Content = filename;

                    int    startPos = filename.LastIndexOf("SK Foods On-Site Scan") + "SK Foods On-Site Scan".Length + 1;
                    int    length   = filename.IndexOf("æ") - startPos - 1;
                    string sub      = filename.Substring(startPos, length);

                    lblFolder.Content = sub;

                    GrayScaleImage = AForge.Imaging.Image.FromFile(filename);
                    imageLoaded    = true;
                }
            }
            if (imageLoaded)
            {
                AForge.Imaging.UnmanagedImage unmanagedImage1 = AForge.Imaging.UnmanagedImage.FromManagedImage(GrayScaleImage);
                Bitmap      managedImage   = unmanagedImage1.ToManagedImage();
                BitmapImage GrayImage_temp = ToBitmapImage(managedImage);
                imgGray.Source = GrayImage_temp;
            }
        }