title: Selenium ChromeDriver switch tabs
body: <p>When I click on a link in my test, it opens a new tab. 
  I want ChromeDriver to then focus on that tab. I have tried the following code to get ChromeDriver to change tabas using the ctrl+tab shortcut:</p>
  
  <pre><code>Actions builder = new Actions(driver);
  builder.KeyDown(Keys.Control).KeyDown(Keys.Tab).KeyUp(Keys.Tab).KeyUp(Keys.Control);//switch tabs
  IAction switchTabs = builder.Build();
  switchTabs.Perform();
  </code></pre>
  
  <p>But this throws the following exception:</p>
  
  <pre><code>ekmLiveChat.tests.UITests.EndToEndTest.EndToEnd:
  System.ArgumentException : key must be a modifier key (Keys.Shift, Keys.Control, or Keys.Alt)
  Parameter name: key
  </code></pre>
  
  <p><strong>Is there a way to switch tabs using ChromeDriver?</strong></p>