Download File In Firefox and Chrome Driver !

Firefox Driver -

private static IWebDriver FireFoxWebDriver()
        {
            // create profile object
            var profile = new FirefoxProfile();
            // get Log Execution Path
            String getExecutingPath = new FileInfo(Assembly.GetExecutingAssembly().Location).DirectoryName;
            // set profile preferences
            profile.SetPreference("FireFox" + DateTime.Now.Ticks + ".log", getExecutingPath);
            profile.SetPreference("browser.download.folderList", 2);
            profile.SetPreference("browser.download.dir", DownloadFilePath);
            profile.SetPreference("browser.helperApps.neverAsk.saveToDisk", "application/octet-stream doc docx xls xlsx pdf txt zip");
            IWebDriver webDriver = new FirefoxDriver(new FirefoxBinary(), profile, TimeSpan.FromMinutes(3));
            // set page load duration
            webDriver.Manage().Timeouts().SetPageLoadTimeout(TimeSpan.FromSeconds(TimeOut));
            // set cursor position center of the screen
            Cursor.Position = new Point(Screen.PrimaryScreen.Bounds.Width / 2, Screen.PrimaryScreen.Bounds.Height / 2);
            return webDriver;
        }

Chrome Driver -

private static IWebDriver ChromeWebDriver()
        {
            // chrome preferences
            var chromeOptions = new ChromeOptionsWithPrefs
            {
                Prefs = new Dictionary
                {
                    {"download.default_directory", DownloadFilePath},
                    {"download.prompt_for_download", false},
                    {"profile.default_content_settings.popups", 0},
                    {"intl.accept_languages", "nl"}
                }
            };

            // chrome capabilities
            var desiredCapabilities = DesiredCapabilities.Chrome();
            desiredCapabilities.SetCapability(ChromeOptions.Capability, chromeOptions);
            // chrome driver path
            string chromeDriverPath = (Path.GetDirectoryName
                (Assembly.GetExecutingAssembly().GetName().CodeBase)
                + "\\..\\..\\..\\..\\ExternalAssemblies").Replace("file:\\", "");
            // create chrome browser instance
            IWebDriver webDriver = new ChromeDriver(chromeDriverPath, chromeOptions, TimeSpan.FromMinutes(3));
            return webDriver;
        }