public static void Run()
        {
            string filePath    = Constants.SAMPLE_DOCX;
            string filePathOut = Path.Combine(Constants.GetOutputDirectoryPath(), Constants.SAMPLE_NAME + Path.GetExtension(filePath));

            OrientationOptions orientationOptions = new OrientationOptions(OrientationMode.Landscape, new int[] { 3, 4 });

            using (Merger merger = new Merger(filePath))
            {
                merger.ChangeOrientation(orientationOptions);
                merger.Save(filePathOut);
            }

            Console.WriteLine("Source document changed orientation successfully.");
            Console.WriteLine($"Check output {filePathOut}.");
        }