UA 示例(您可能需要自己 Google 才能找到适合您目的的):
Mozilla/5.0(iPad;CPU OS 6_0,如 Mac OS X)AppleWebKit/536.26(KHTML,如 Gecko)版本/6.0 Mobile/10A5355d Safari/8536.25
C# 火狐浏览器:
FirefoxProfile profile = new FirefoxProfile();
profile.SetPreference("general.useragent.override", "Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25");
IWebDriver driver = new FirefoxDriver(profile);
C# 铬:
ChromeOptions options = new ChromeOptions();
options.AddArgument("--user-agent=Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25");
IWebDriver driver = new ChromeDriver(options);
C# PhantomJS(未经测试的代码):
PhantomJSOptions options = new PhantomJSOptions();
options.AddAdditionalCapability("phantomjs.page.settings.userAgent", "Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25");
IWebDriver driver = new PhantomJSDriver(options);
C# IE:抱歉,我认为 Selenium 本身不可能做到这一点。
进一步阅读:使用 Selenium WebDriver C# 和 Ruby 设置用户代理 http://yizeng.me/2013/08/10/set-user-agent-using-selenium-webdriver-c-and-ruby/