Windows Desktop Runtime 8.0 11 [new] -

using System; using System.Runtime.InteropServices; using System.Windows; using System.Windows.Media; namespace Win11AcrylicFeature { public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); SourceInitialized += (s, e) => Win11ThemeHelper.ApplyDarkTitleBar(this); Loaded += (s, e) => ApplyAcrylicIfSupported(); }

<Window x:Class="Win11AcrylicFeature.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" Title="Windows 11 Acrylic Demo" Height="450" Width="600" Background="Transparent" AllowsTransparency="True" WindowStyle="None"> <Grid> <Border x:Name="AcrylicBorder" Background="White" Opacity="0.85"> <Border.Background> <SolidColorBrush Color="#CCFFFFFF"/> </Border.Background> </Border> <StackPanel Margin="20"> <CheckBox x:Name="AcrylicToggle" Content="Enable Acrylic (Windows 11)" Checked="ToggleAcrylic" Unchecked="ToggleAcrylic"/> <TextBlock Text="This window uses dark mode title bar and optional acrylic blur." TextWrapping="Wrap" Margin="0,20"/> </StackPanel> </Grid> </Window> windows desktop runtime 8.0 11

private void ApplyAcrylicIfSupported() { if (IsWindows11OrNewer()) { var acrylicBrush = new SolidColorBrush(Color.FromArgb(180, 32, 32, 32)); AcrylicBorder.Background = acrylicBrush; // Real acrylic requires WinUI or custom composition – for demo we use semi-transparent. } } using System; using System