title: Compound class names are not supported. Consider searching for one class name and filtering the results
body: <p>I am using driver.findelement by.classname method to read an element on firefox browser but i am getting "Compound class names are not supported. Consider searching for one class name and filtering the results." exception</p>
  
  <p>here is my code</p>
  
  <pre><code>driver.FindElement(By.ClassName("bighead crb")).Text.Trim().ToString()
  
  //and here is how the html of browser looks like
  
  &lt;form action="#" id="aspnetForm" onsubmit="return false;"&gt;
      &lt;section id="lx-home" style="margin-bottom:50px;"&gt;
    &lt;div class="bigbanner"&gt;
      &lt;div class="splash mc"&gt;
        &lt;div class="bighead crb"&gt;LEAD DELIVERY MADE EASY&lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
   &lt;/section&gt;
  &lt;/form&gt;
  </code></pre>