TaskHost.exe' has exited with code -2147220717 (0x80040313)

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I've Navigate to next page and then Navigate back in windows phone 8, If 5 or 6 times i do this app is crashed and output windows shows "TaskHost.exe has exited with code -2147220717 (0x80040313)". I don't know why this is happening. If anybody knows please suggest me.

//////////////////// OUTPUT FROM DEBUG /////////////
'TaskHost.exe' (Win32): Loaded '\Device\HarddiskVolume27\Windows\System32\WebBrowserControlRes.dll'. Module was built without symbols. 'TaskHost.exe' (Win32): Unloaded '\Device\HarddiskVolume27\Windows\System32\WebBrowserControlRes.dll' 'TaskHost.exe' (Win32): Loaded '\Device\HarddiskVolume27\Windows\System32\UIXMobileAssets480x800.dll'. Module was built without symbols. 'TaskHost.exe' (Win32): Unloaded '\Device\HarddiskVolume27\Windows\System32\UIXMobileAssets480x800.dll' 'TaskHost.exe' (Win32): Loaded '\Device\HarddiskVolume27\Windows\System32\UIXMobileAssets480x800.dll'. Module was built without symbols. 'TaskHost.exe' (Win32): Unloaded '\Device\HarddiskVolume27\Windows\System32\UIXMobileAssets480x800.dll' 'TaskHost.exe' (Win32): Loaded '\Device\HarddiskVolume27\Windows\System32\UIXMobileAssets480x800.dll'. Module was built without symbols. 'TaskHost.exe' (Win32): Unloaded '\Device\HarddiskVolume27\Windows\System32\UIXMobileAssets480x800.dll' 'TaskHost.exe' (Win32): Loaded '\Device\HarddiskVolume27\Windows\System32\UIXMobileAssets480x800.dll'. Module was built without symbols. 'TaskHost.exe' (Win32): Unloaded '\Device\HarddiskVolume27\Windows\System32\UIXMobileAssets480x800.dll' First-chance exception at 0x76FC1EDB in TaskHost.exe: Microsoft C++ exception: LegacyHelper::ApiException at memory location 0x0C57F658. First-chance exception at 0x76FC1EDB in TaskHost.exe: Microsoft C++ exception: LegacyHelper::ApiException at memory location 0x0C57F230. First-chance exception at 0x76FC1EDB (KERNELBASE.DLL) in TaskHost.exe: 0xE0434352 (parameters: 0x80131501, 0x00000000, 0x00000000, 0x00000000, 0x70150000). The thread 0xe34 has exited with code 0 (0x0). First-chance exception at 0x76FC1EDB in TaskHost.exe: Microsoft C++ exception: Js::JavascriptExceptionObject at memory location 0x0C57D7A8. First-chance exception at 0x76FC1EDB in TaskHost.exe: Microsoft C++ exception: Js::JavascriptExceptionObject at memory location 0x0C57D498. First-chance exception at 0x76FC1EDB in TaskHost.exe: Microsoft C++ exception: Js::JavascriptExceptionObject at memory location 0x0C57D188. First-chance exception at 0x76FC1EDB in TaskHost.exe: Microsoft C++ exception: Js::JavascriptExceptionObject at memory location 0x0C57DAD0. First-chance exception at 0x76FC1EDB in TaskHost.exe: Microsoft C++ exception: Js::JavascriptExceptionObject at memory location 0x0C57EBF8. First-chance exception at 0x76FC1EDB in TaskHost.exe: Microsoft C++ exception: LegacyHelper::ApiException at memory location 0x0C57DF08. The thread 0xe08 has exited with code -2147220717 (0x80040313). The thread 0x7b0 has exited with code -2147220717 (0x80040313).The thread 0x10c has exited with code -2147220717 (0x80040313). The thread 0x40c has exited with code -2147220717 (0x80040313). The thread 0xd44 has exited with code -2147220717 (0x80040313). The thread 0x658 has exited with code -2147220717 (0x80040313). The thread 0x210 has exited with code -2147220717 (0x80040313). The thread 0xc64 has exited with code -2147220717 (0x80040313). The thread 0xbc4 has exited with code -2147220717 (0x80040313). The thread 0xf58 has exited with code -2147220717 (0x80040313). The thread 0xd68 has exited with code -2147220717 (0x80040313). The thread 0xdc4 has exited with code -2147220717 (0x80040313). The thread 0x9ac has exited with code -2147220717 (0x80040313). The thread 0x378 has exited with code -2147220717 (0x80040313). The thread 0x618 has exited with code -2147220717 (0x80040313). The thread 0x434 has exited with code -2147220717 (0x80040313). The thread 0x78 has exited with code -2147220717 (0x80040313). The thread 0xef8 has exited with code -2147220717 (0x80040313). The thread 0xf5c has exited with code -2147220717 (0x80040313). The thread 0x880 has exited with code -2147220717 (0x80040313). The thread 0x958 has exited with code -2147220717 (0x80040313). The thread 0x898 has exited with code -2147220717 (0x80040313). The thread 0xbd8 has exited with code -2147220717 (0x80040313). The thread 0x978 has exited with code -2147220717 (0x80040313). The thread 0xc8c has exited with code -2147220717 (0x80040313). The thread 0xd54 has exited with code -2147220717 (0x80040313). The thread 0xc68 has exited with code -2147220717 (0x80040313). The thread 0xcf4 has exited with code -2147220717 (0x80040313). The thread 0x8c has exited with code -2147220717 (0x80040313). The thread 0xcc8 has exited with code -2147220717 (0x80040313). The thread 0x848 has exited with code -2147220717 (0x80040313). The thread 0xb04 has exited with code -2147220717 (0x80040313). The thread 0xf90 has exited with code -2147220717 (0x80040313). The thread 0xe6c has exited with code -2147220717 (0x80040313). The program '[3700] TaskHost.exe' has exited with code -2147220717 (0x80040313).

//////////////// MainPage /////////////////

protected override void OnNavigatedFrom(NavigationEventArgs e)
    {
        base.OnNavigatedFrom(e);

    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {

        base.OnNavigatedTo(e);
        App app=App.Current as App;
        if (app.IsFromFavouritePage)
        {
                ShowStoryboard.Begin();
                app.IsFromFavouritePage = false;
                MainViewModel mvm = DataContext as MainViewModel;
                mvm.RingtoneCollection.Clear();
                mvm.RingtoneCollection = CheckFavouriteRingtone(app.CollectionOfRingtone, app.CollectionOfRingtone[0].category_ringtone_id.ToString());
                ApplicationBar.IsVisible = true;

        }

    }

private void favListButton_Click(object sender, RoutedEventArgs e)
    {
        MainViewModel mvm = DataContext as MainViewModel;
        App app = App.Current as App;
        app.CollectionOfRingtone.Clear();
        foreach (RingtoneClass aRingtone in mvm.RingtoneCollection)
        {
            app.CollectionOfRingtone.Add(aRingtone);
        }