public static void Run() { var configuration = new Configuration(Common.MyAppSid, Common.MyAppKey); var apiInstance = new PagesApi(configuration); try { var fileInfo = new FileInfo { FilePath = "WordProcessing/four-pages.docx" }; var options = new OrientationOptions { FileInfo = fileInfo, OutputPath = "Output/change-page-orientation.docx", Pages = new List <int?> { 2, 4 }, Mode = OrientationOptions.ModeEnum.Landscape }; var request = new OrientationRequest(options); var response = apiInstance.Orientation(request); Console.WriteLine("Output file path: " + response.Path); } catch (Exception e) { Console.WriteLine("Exception while calling api: " + e.Message); } }