App.xaml

<Application x:Class="fs2ff.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:local="clr-namespace:fs2ff"
             xmlns:ui="http://schemas.modernwpf.com/2019"
             StartupUri="MainWindow.xaml"
             mc:Ignorable="d">
    <Application.Resources>
        <ResourceDictionary x:Key="Resources">
            <local:ViewModelLocator x:Key="Locator" d:IsDataSource="True" />
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Resources.xaml" />
                <ui:ThemeResources RequestedTheme="Dark">
                    <ui:ThemeResources.ThemeDictionaries>
                        <ResourceDictionary x:Key="Dark">
                            <ResourceDictionary.MergedDictionaries>
                                <ui:ColorPaletteResources
                                    TargetTheme="Dark"
                                    Accent="Goldenrod"
                                    AltHigh="#FF232323" />
                            </ResourceDictionary.MergedDictionaries>
                        </ResourceDictionary>
                    </ui:ThemeResources.ThemeDictionaries>
                </ui:ThemeResources>
                <ui:XamlControlsResources />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>