windows store app setting

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Windows

Win8

public sealed partial class MainPage : Page
   {

       DispatcherTimer timer = new DispatcherTimer();
       public MainPage()
       {
           this.InitializeComponent();
           timer.Interval = TimeSpan.FromMilliseconds(1);
           timer.Tick += timer_Tick;
           timer.Start();
       }

       void timer_Tick(object sender, object e)
       {

           DateTime mytime = DateTime.Now;
           string time12 = mytime.ToString("hh:mm:ss tt"); // time 12 hours
           string Use24H = mytime.ToString("HH:mm:ss");   // time 24 hours
           dititalclock.Text = time12;

       }

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <TextBlock x:Name="dititalclock" HorizontalAlignment="Left" TextWrapping="Wrap" VerticalAlignment="Top" Height="537" Width="1366" FontSize="300" FontFamily="Digital-7" Margin="0,231,0,0" Foreground="#FFE42525"/>

    </Grid>

Settings Page

public sealed partial class SettingsFlyout1 : SettingsFlyout
   {
       public SettingsFlyout1()
       {
           this.InitializeComponent();

       }

<SettingsFlyout
    x:Class="ClockTest.SettingsFlyout1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:ClockTest"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    IconSource="Assets/SmallLogo.png"
    Title="SettingsFlyout1"
    d:DesignWidth="346">

    <!-- This StackPanel acts as a root panel for vertical layout of the content sections -->
    <StackPanel VerticalAlignment="Stretch" HorizontalAlignment="Stretch" >

        <!-- The StackPanel(s) below define individual content sections -->

        <!-- Content Section 1-->
        <StackPanel Style="{StaticResource SettingsFlyoutSectionStyle}">

            <!-- Section 1 header -->

            <!-- Section 1 body -->

        </StackPanel>
        <TextBlock TextWrapping="Wrap" Text="24 Hours" Height="28" FontSize="25"/>
        <ToggleSwitch x:Name="utctime24" Header="ToggleSwitch" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Height="88" Width="187"/>

        <!-- Define more Content Sections below as necessary -->

    </StackPanel>
</SettingsFlyout>

i want to togle switch on then time display as 24 hours mode , its of then 12 hours an save the setting , if i am close the app start again whiich seeting i am saved that will deafult an run the app (if togle switch on 24 hours mode and close app it setting permanent , togle swich is of then 12 hours mode seeting permanent ) plase help or any sample app for how to app setting work i don't need windows sdk sample its only showing how to add setting , i want how to work with thatt setting