Adding a ContentTemplate attribute

Up to this point, we only have placeholder code in our MainShell file. Let's replace this with actual content, as follows:

1. In the News project, open MainShell.xaml. 
2. Locate the FlyoutItem element with the title set to Home.
3. Edit the XAML so that the ShellContent element becomes self-closing, add the following ContentTemplate attribute marked in bold, and replace the contents of the Tab element:

<FlyoutItem Title="Home"
            Icon="{StaticResource HomeIcon}">
  <ShellContent Title="Headlines"
                Icon="{StaticResource HeadlinesIcon}"
                ContentTemplate="{DataTemplate 
                 views:HeadlinesView}" />

   <Tab Title="News" Route="news" Icon="{StaticResource NewsIcon}">
    <ShellContent Title="Local" Route="local" >
      <ShellContent.ContentTemplate>
        &lt...