WP7 An Image over the full display - silverlight

Question

I am developing an application where i want to browse images like native WindowsPhone form.
I have used Pivot control. Everything works, but there is one unwanted thing. The image does not fill all display area. There is a gap on the top of page. I have set margin and padding everywhere where it is possible. And the result is still the same. :(
Here is my XAML code:
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid
x:Name="LayoutRoot"
Background="Transparent"
Margin="0">
<toolkit:PerformanceProgressBar
VerticalAlignment="Top"
HorizontalAlignment="Left"
IsIndeterminate="{Binding IsBusy}"
Visibility="{Binding IsBusy, Converter={StaticResource BoolToVisibilityConverter}}"
/>
<controls:Pivot
x:Name="PhotoPivot"
ScrollViewer.HorizontalScrollBarVisibility="Auto"
IsHitTestVisible="True"
ItemsSource="{Binding Photos}"
Margin="0"
Padding="0"
>
<controls:Pivot.HeaderTemplate>
<DataTemplate/>
</controls:Pivot.HeaderTemplate>
<controls:Pivot.ItemTemplate>
<DataTemplate >
<controls:PivotItem
x:Name="PhotoPivotItem"
Margin="0"
>
<Image
x:Name="PhotoPicture"
Source="{Binding}"
Stretch="Uniform"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Margin="0"
/>
</controls:PivotItem>
</DataTemplate>
</controls:Pivot.ItemTemplate>
</controls:Pivot>
</Grid>

Answer 1

Are you talking about the system tray?
To remove the system tray use the following code:
shell:SystemTray.IsVisible="False"
Update:
I'm not real sure why that extra space is there.
I created a simplified version of your example and the only thing I could think of is to use negative margins. There is probably a better solution that I am just overlooking, but for now you can just use the following:
<controls:PivotItem x:Name="PhotoPivotItem" Margin="0,-10,0,0">
Although, from your posted image, it looks as if you have a bigger gap than I did, so you might need to decrease the margin.