更新

WPFluent.Gallery/Views/Windows/MainWindow.xaml.cs

@@ -1,8 +1,4 @@
-// This Source Code Form is subject to the terms of the MIT License.
-// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
-// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
-// All Rights Reserved.
-
+using WPFluent.Appearance;
 using WPFluent.Gallery.ViewModels.Windows;
 
 namespace WPFluent.Gallery.Views.Windows;
@@ -16,4 +12,12 @@ public partial class MainWindow
         InitializeComponent();
     }
     public MainWindowViewModel ViewModel { get; }
+
+    private void TitleBar_HelpClicked(TitleBar sender, RoutedEventArgs args)
+    {
+        var theme = ThemeManager.GetAppTheme();
+        ThemeManager.ChangeAppTheme(theme
+             == ThemeType.Light ? ThemeType.Dark : ThemeType.Light);
+        //var res = Application.Current.Resources;
+    }
 }