title: WPF - TemplateBinding doesn't recognize member content
body: <p>Alright, so I have a window with the following resources</p>
  
  <pre><code>&lt;Window.Resources&gt;
      &lt;Style TargetType="Button"&gt;
          &lt;Setter Property="Template"&gt;
              &lt;Setter.Value&gt;
                  &lt;ControlTemplate&gt;
                      &lt;Grid&gt;
                          &lt;TextBlock Text="{TemplateBinding Content}"/&gt;
                      &lt;/Grid&gt;
                  &lt;/ControlTemplate&gt;
              &lt;/Setter.Value&gt;
          &lt;/Setter&gt;
      &lt;/Style&gt;
  &lt;/Window.Resources&gt;
  </code></pre>
  
  <p>I am getting an error saying that,  "The member "Content" is not recognized or is not accessible."
  What am I doing wrong?</p>