ImageCompressor.MainWindow.openButton_Click C# (CSharp) Method

        private void openButton_Click(object sender, RoutedEventArgs e)
        {
            var dlg = new OpenFileDialog();
            if (dlg.ShowDialog(this).Value)
            {
                try
                {
                    if (new FileInfo(dlg.FileName).Extension.ToLower() == ".bmpc")
                    {
                        var image = new ImageBMPC(dlg.FileName, false, null);
                        var writable = new WriteableBitmap(image.Size.Width, image.Size.Height, 96, 96, PixelFormats.Bgra32, null);
                        int stride = (image.Size.Width * 32 + 7) / 8;

                        // Flip RB Color bits
                        var data = new byte[image.Mipmaps[0].Data.LongLength];
                        image.Mipmaps[0].Data.CopyTo(data, 0);
                        for (int i2 = 0; i2 != data.Length; i2 += 4)
                        {
                            byte c = data[i2];
                            data[i2] = data[i2+2];
                            data[i2+2] = c;
                        }

                        writable.WritePixels(new Int32Rect(0, 0, image.Size.Width, image.Size.Height), data, stride, 0);
                        dstImage.Source = writable;
                    }
                    else
                    {
                        // Load binary data
                        var bitmap = new BitmapImage(new Uri(dlg.FileName, UriKind.Absolute));
                        int stride = (bitmap.PixelWidth * bitmap.Format.BitsPerPixel + 7) / 8;
                        srcData = new byte[bitmap.PixelWidth * stride];
                        dstData = new byte[bitmap.PixelWidth * stride];
                        bitmap.CopyPixels(srcData, stride, 0);
                        bitmap.CopyPixels(dstData, stride, 0);

                        // Get image atributes
                        var ext = new FileInfo(dlg.FileName).Extension.ToLower();
                        width = bitmap.PixelWidth;
                        height = bitmap.PixelHeight;

                        // Display images
                        var w = new WriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight, 96, 96, PixelFormats.Bgra32, null);
                        w.WritePixels(new Int32Rect(0, 0, bitmap.PixelWidth, bitmap.PixelHeight), srcData, stride, 0);
                        dstImage.Source = w;
                        srcImage.Source = bitmap;

                        processesImage();
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }