AppShell.xaml

<TabBar>
        <Tab Title="Feed Page" Icon="tab_feed.png">
            <ShellContent  ContentTemplate="{DataTemplate views:FeedPage}">
                </ShellContent>
        </Tab>
        <Tab Title="About Page" Icon="tab_about.png" >
            <ShellContent ContentTemplate="{DataTemplate views:AboutPage}">
                </ShellContent>
        </Tab>
        </TabBar>