[C#]파일 확장자로 구분해서 image 저장

public void SaveImage(Image image, string filename)
{
    string extension = Path.GetExtension(filename);
    switch (extension.ToLower())
    {
        case ".bmp":
            image.Save(filename, ImageFormat.Bmp);
            break;
        case ".exif":
            image.Save(filename, ImageFormat.Exif);
            break;
        case ".gif":
            image.Save(filename, ImageFormat.Gif);
            break;
        case ".jpg":
        case ".jpeg":
            image.Save(filename, ImageFormat.Jpeg);
            break;
        case ".png":
            image.Save(filename, ImageFormat.Png);
            break;
        case ".tif":
        case ".tiff":
            image.Save(filename, ImageFormat.Tiff);
            break;
        default:
            throw new NotSupportedException(
                "Unknown file extension " + extension);
    }
}