public void Run()
        {
            FileUrl = @"https://www.le.ac.uk/oerresources/bdra/html/page_01.htm";
            //FileUrl = @"https://docs.gitlab.com/ee/README.html";
            string name = "page_01.htm";
            string ext = (Format == "tiff") ? "tif" 
                : ((Format == "jpeg") ? "jpg" 
                : ((Format == "mhtml") ? "mht" : Format));
            string outFile = $"{Path.GetFileNameWithoutExtension(name)}_converted.{ext}";

            IConversionApi convApi = new HtmlApi(CommonSettings.ClientId, CommonSettings.ClientSecret, CommonSettings.BasePath);
            StreamResponse response = null;
            // call SDK methods that convert HTML document to supported out format
            switch (Format)
            {
                case "pdf":
                    response = convApi.GetConvertDocumentToPdfByUrl(FileUrl, 1200, 800);
                    break;
                case "xps":
                    response = convApi.GetConvertDocumentToXpsByUrl(FileUrl, 1200, 800);
                    break;
                case "jpeg":
                case "bmp":
                case "png":
                case "tiff":
                case "gif":
                    response = convApi.GetConvertDocumentToImageByUrl(FileUrl, Format, 800, 1200);
                    break;
                case "mhtml":
                    response = convApi.GetConvertDocumentToMHTMLByUrl(FileUrl);
                    break;
                default:
                    throw new ArgumentException($"Unsupported output format: {Format}");
            }

            if (response != null && response.ContentStream != null && response.Status == "OK")
            {
                string respFileName = response.FileName;
                string outPath = Path.Combine(CommonSettings.OutDirectory, respFileName ?? outFile);

                Stream stream = response.ContentStream;
                using (FileStream fstr = new FileStream(outPath, FileMode.Create, FileAccess.Write))
                {
                    stream.Position = 0;
                    stream.CopyTo(fstr);
                    fstr.Flush();
                    Console.WriteLine(string.Format("\nResult file downloaded to: {0}", outPath));
                }
            }

        }