ApplicationBar.xaml

<phone:PhoneApplicationPage 
    x:Class="AppBar.PivotPage1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:controls="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d" >
    <phone:PhoneApplicationPage.Resources>
        <shell:ApplicationBar x:Key="Appbar1" IsVisible="True" Mode="Default">
            <shell:ApplicationBarIconButton Text="button" IconUri="/Assets/AppBar/appbar.add.rest.png"/>
        </shell:ApplicationBar>
        <shell:ApplicationBar x:Key="Appbar2" IsVisible="True" Mode="Default">
            <shell:ApplicationBarIconButton Text="button" IconUri="/Assets/AppBar/appbar.back.rest.png"/>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.Resources>
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <controls:Pivot Title="MY APPLICATION" Name="Testpivot">
            <controls:PivotItem Header="item1">
                <Grid/>
            </controls:PivotItem>
            <controls:PivotItem Header="item2">
                <Grid/>
            </controls:PivotItem>
        </controls:Pivot>
    </Grid>    
</phone:PhoneApplicationPage>