AtomicUI.WPF

Stop making apps that look like the Windows 11 Settings panel. AtomicUI.WPF is the evolution of the Fluent design system — a tactile, high‑end visual language that Microsoft’s default themes simply can’t match.

Beyond flat: glass‑morphism, refractive depth, layered surfaces, and smooth motion that give your app a “future Windows” feel without switching frameworks.

Zero Learning Curve: Styles native WPF controls automatically. No Atomic:Button, no ui:Button, no EditButton — it’s just a normal Button. No custom markup, no redesigning your UI, no wrestling with massive XAML templates just to change a color. Keep your existing XAML — it just looks modern

Better than Microsoft’s defaults: We’ve taken Fluent, polished it, deepened it, and turned it into a premium professional design system that outclasses the .NET 10 themes.

Legacy power: Bring a 2026‑grade UI to apps running on .NET Framework 4.5.1+. No migration to .NET 10, WinUI, or MAUI required.

🚀 Instant Modernization

1. Install the NuGet package:

   dotnet add package AtomicUI.WPF

2. Merge the theme resource dictionary:

   <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="pack://application:,,,/AtomicUI;component/Themes/DarkTheme.xaml" /> <ResourceDictionary Source="pack://application:,,,/AtomicUI;component/Themes/Generic.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary>

3. Replace your main window with ModernWindow:

   <ui:ModernWindow x:Class="MyApp.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:ui="clr-namespace:AtomicUI.CustomControls;assembly=AtomicUI" Title="My App"> <!-- Your content --> </ui:ModernWindow> public partial class MainWindow : ModernWindow { public MainWindow() { InitializeComponent(); } }

4. The license key setup instructions

   using AtomicUI; public partial class App : Application { //Only required for paid licenses protected override async void OnStartup(StartupEventArgs e) { ThemeManager.SetKey("MY-LICENSE-KEY"); base.OnStartup(e); } }

That is all it takes, you are now running modern 2026 looking aplication.

For advanced setup - see https://github.com/AtomicAppsUI/AtomicUI.WPF

📬 Support & Contact

For questions, licensing, or technical support email dan@atomicapps.dev.