template/MainPage.xaml

<phone:PhoneApplicationPage 
    x:Class="GapExample.MainPage"
    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:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    shell:SystemTray.IsVisible="True" d:DesignHeight="768" d:DesignWidth="480" xmlns:my="clr-namespace:WP7GapClassLib;assembly=WP7GapClassLib">
    <Grid>

        <my:PGView Name="pGView1" HorizontalAlignment="Stretch"  
                          VerticalAlignment="Stretch"></my:PGView>
        <!--<phone:WebBrowser x:Name="GapBrowser" 
                          Loaded="GapBrowser_Loaded" 
                          HorizontalAlignment="Stretch"  
                          VerticalAlignment="Stretch" 
                          IsScriptEnabled="True" />-->

    </Grid>

</phone:PhoneApplicationPage>