Trial version implementation

trial.xaml

<!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--TitlePanel contains the name of the application and page title-->
        <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock Text="Trial app" Style="{StaticResource PhoneTextNormalStyle}" Margin="12,0"/>
            <TextBlock Text="MainPage" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
        </StackPanel>

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <Button x:Name="firstbutton" Content="First Page" HorizontalAlignment="Left" Margin="78,83,0,0" VerticalAlignment="Top" Width="302" Click="Firstbuttonclick"/>
            <Button x:Name="secondbutton"  Content="Second Page" HorizontalAlignment="Left" Margin="78,198,0,0" VerticalAlignment="Top" Width="302" Click="Secondbuttonclick" IsEnabled="False"/>
            <TextBlock x:Name="statusblock" HorizontalAlignment="Left" Margin="121,389,0,0" TextWrapping="Wrap" Text="Trial Version" VerticalAlignment="Top" Height="57" Width="223" FontSize="36"/>
            <Button x:Name="buybutton" Content="Buy application" HorizontalAlignment="Left" Margin="28,477,0,0" VerticalAlignment="Top" Width="401" Click="buybuttonclick"/>
        </Grid>

     </Grid>