# Apply themes with App.xaml `App.xaml` ```xml ``` # Change themes by ThemeManager Change by static property ```c# ThemeManager.CurrentTheme = ColorThemes.Classic; ``` # Change themes by ResourceDictionary Also you can change theme by adding resource dictionary after generic.xaml. Use one of them: ```xml or or or ``` ## NOTE It is recommended use `Background="{DynamicResource WindowBackgroundBrush}"` for Window markup