unknown error: cannot get automation extension

今天把Selenium的C# Driver升级到了最新的3.0版，结果Code就一直不能执行了，具体错误信息如下。

System.InvalidOperationException was unhandled by user code

HResult=-2146233079

Message=unknown error: cannot get automation extension

from unknown error: Runtime.executionContextCreated has invalid 'context': {"auxData":{"frameId":"2420.1","isDefault":true},"id":1,"name":"","origin":"chrome-extension://aapnijgdinlhnhlmodcfapnahmbfebeb"}

(Session info: chrome=54.0.2840.71)

(Driver info: chromedriver=2.9.248315,platform=Windows NT 6.1 SP1 x86_64)

Source=WebDriver

StackTrace:

at OpenQA.Selenium.Remote.RemoteWebDriver.UnpackAndThrowOnError(Response errorResponse)

at OpenQA.Selenium.Remote.RemoteWebDriver.Execute(String driverCommandToExecute, Dictionary`2 parameters)

at OpenQA.Selenium.Remote.RemoteWebDriver.InternalExecute(String driverCommandToExecute, Dictionary`2 parameters)

at OpenQA.Selenium.Remote.RemoteWindow.get_Size()

at APX.Cloud.WebElement.WebDriver..ctor(String token) in c:\Git\APX.Cloud\APX.Cloud.WebElement\WebDriver.cs:line 77

at APX.Cloud.TestBusinessLogic.Common.APXCloudHelper.InitialWebDriver(String driverToken) in c:\Git\APX.Cloud\APX.Cloud.TestBusinessLogic\Common\APXCloudHelper.cs:line 69

at APX.CloudUI.Test.TestBase.TestInitialize() in c:\Git\APX.Cloud\APX.CloudUI.Test\TestBase.cs:line 160

InnerException:

找了很久才发现原来是我的chromedriver.exe版本太旧了，升级到最新版后就好了。在这里有一个小问题， Selenium的版本规则是大版本号+小版本号，所以：

2.1远远早于2.10

2.9比2.10早

各个版本的时间顺序从新到旧是：

2.19>2.10>2.9>2.1

http://selenium-release.storage.googleapis.com/index.html

Chrome Driver:

http://chromedriver.storage.googleapis.com/index.html

PhantomJS Driver:

http://phantomjs.org/download.html