How To Save Chat in Windows Phone 8 - windows-phone-8

Question

Hi All i am working on a windows phone chat application and i have done chatting with both end now i am facing issue when i reopen my app my all previous chat history is removed. how i can save my previous chat history please help me.
Thanks
i am using following code
<ListBox Name="listChat" Grid.Row="0" ItemsSource="{Binding Path=Instance.Messages,Source={StaticResource Binder}}">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Width="430">
<cc:ChatBubble Width="380" HorizontalAlignment="{Binding Converter={StaticResource MType},ConverterParameter=align}" Opacity="{Binding Converter={StaticResource MType}}" ChatBubbleDirection="{Binding Converter={StaticResource MType},ConverterParameter=direction}" Margin="0,0,0,10" >
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
<RowDefinition Height="40"></RowDefinition>
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" HorizontalAlignment="Left" FontSize="17" Text="{Binding Name}"></TextBlock>
<TextBlock Grid.Row="0" HorizontalAlignment="Right" FontSize="17" Text="{Binding SendingDate}"></TextBlock>
<TextBlock Grid.Row="1" Name="txt_Msg" Text="{Binding Text}" TextWrapping="Wrap" Width="430"></TextBlock>
</Grid>
</cc:ChatBubble>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>

Answer 1

the easiest way is Isolated Storage
For example I have this helper class
public static class SettingsManager
{
private static IsolatedStorageSettings appSettings;
public static IsolatedStorageSettings AppSettings
{
get { return SettingsManager.appSettings; }
set { SettingsManager.appSettings = value; }
}
public static void LoadSettings()
{
if (appSettings == null)
appSettings = IsolatedStorageSettings.ApplicationSettings;
if (!appSettings.Contains(SettingValues.LoadedData))
appSettings[SettingValues.LoadedData] = false;
appSettings.Save();
}
public static void SaveValue(string key, object value)
{
appSettings[key] = value;
appSettings.Save();
}
}
Then you can use it as follows
SettingsManager.SaveValue("myname", someVariableYouWantToStore);
And after start, you can load it with
SettingsManager.AppSettings["myname"]