title: Change Header background of tabItem in silverlight
body: <p>How can I change Color of header in TabItem</p>
  
  <pre><code>tabItem1.Background = new SolidColorBrush(Colors.Red);//This is not changing background
  tabItem1.BorderBrush = new SolidColorBrush(Colors.Red);//This change header border color
  </code></pre>