Why is Theme/Style not applied to Controls inside a Page?

[LiTo96]

Hi there,

I have implemented a navigation example with the HamburgerMenu like in https://mahapps.com/docs/controls/HamburgerMenu.
In App.xaml I set the Theme like this:

<Application.Resources>
  <ResourceDictionary>
    <ResourceDictionary.MergedDictionaries>

      <!--  MahApps.Metro resource dictionaries. Make sure that all file names are Case Sensitive!  -->
      <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
      <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />

      <!--  Theme setting  -->
      <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Themes/Dark.Emerald.xaml" />

    </ResourceDictionary.MergedDictionaries>
  </ResourceDictionary>
</Application.Resources>

In my MainWindow.xaml I have:

<mah:HamburgerMenu x:Name="HamburgerMenuControl"
                   DisplayMode="CompactInline"
                   ItemInvoked="HamburgerMenu_OnItemInvoked"
                   ItemTemplate="{StaticResource HamburgerMenuItem}">
  <mah:HamburgerMenu.ItemsSource>
    <mah:HamburgerMenuItemCollection>
      <mah:HamburgerMenuGlyphItem Label="Page 1" TargetPageType="{x:Type views:Page1}" />
      <mah:HamburgerMenuGlyphItem Label="Page 2" TargetPageType="{x:Type views:Page2}" />
    </mah:HamburgerMenuItemCollection>
  </mah:HamburgerMenu.ItemsSource>
</mah:HamburgerMenu>

The content of the HamburgerMenu is set in code behind to the Frame of the NavigationService like in the example.

And my Page1.xaml or Page2.xaml are just a simple Page with a Textblock in it:

<Page x:Class="Presentation.Views.Page1"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

  <Grid>
    <TextBlock Text="This is Page 1" />
  </Grid>
</Page>

The problem I have is that the Foreground of the TextBlock in the Page is Black, when my theme is dark and therefore my background is also black. How can I accomplish that the TextBlock in the Page I navigate to uses the correct Foreground according to the current Theme?

When I add a TextBlock in the MainWindow its Foreground is correct (White).
The Style is just not applied to the controls in the Page I navigate to...

[LiTo96]

Ok sorry, I did bad research...
I found the solution here: #3365
The problem seems to be the Frame.
The Style MetroPage didn't work for me though (I don't know if that even still exists), but using Style="{DynamicResource MahApps.Styles.Page}" did work.