private void Img_save(object sender, RoutedEventArgs e)
        {
            SaveFileDialog dialog = new SaveFileDialog();

            dialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

            if (dialog.ShowDialog() == true)
            {
                ImgConverter.CreateBitmapFromVisual(ImgCanvas, dialog.FileName);
            }
        }