title: Get value with Selenium C#
body: <p>I have </p>
  
  <pre><code>`&lt;button class="button button--chromeless" data-action="select-anchor" data-action-value="fba4"&gt;Top highlight&lt;/button&gt;`
  </code></pre>
  
  <p>I need get result "fba4" from data-action-value.</p>
  
  <p>I tried:</p>
  
  <pre><code>IWebElement ell = driver.FindElement(By.CssSelector("button[data-action-value]"));
  </code></pre>
  
  <p>I think that I need be based on Top highlight to get value fba4 but I don't know how?</p>