AtomicUI.Wpf 1.3.8

AtomicUI.WPF

Modern WPF theme for .NET Framework and modern .NET.
Premium Fluent-inspired UI for native WPF desktop applications.

Modern UI. Minimal XAML. 2026-ready. Atomic speed.

AtomicUI.WPF styles native WPF controls automatically, giving existing desktop applications a polished, modern interface without replacing standard WPF controls or rewriting your UI.

• Dark & Light themes
• Native WPF controls
• Custom ModernWindow chrome
• Smooth animations and transitions
• .NET Framework 4.5.1+ and modern .NET
• Windows 7 → Windows 11

🚀 Try the AtomicUI Gallery

Explore AtomicUI.WPF in the official Gallery with live controls, themes, animations, and layouts.

Microsoft Store:
https://apps.microsoft.com/detail/9PHND2W8WGG7?hl=en-us&gl=GB&ocid=pdpshare

Built with AtomicUI

AtomicUI.WPF is also used in commercial Windows applications, including Map Secrets and Tank Secrets.

📦 Installation

dotnet add package AtomicUI.Wpf

🧩 Setup

Using ModernWindow (recommended)

ModernWindow is optional, but recommended for the best AtomicUI experience.

If your application uses ModernWindow, you do not need to add DarkTheme.xaml or LightTheme.xaml manually.

Merge Generic.xaml only:

<ResourceDictionary>
  <ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="/AtomicUI;component/Themes/Generic.xaml" />
  </ResourceDictionary.MergedDictionaries>
</ResourceDictionary>

ModernWindow automatically loads and manages the active Dark or Light theme.

Use ModernWindow in place of a standard WPF Window:

<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">
    
</ui:ModernWindow>

public partial class MainWindow : ModernWindow
{
    public MainWindow()
    {
        InitializeComponent();
    }
}

Theme selection

Set the initial theme using IsDarkTheme:

<ui:ModernWindow
    ...
    IsDarkTheme="True">
</ui:ModernWindow>

• IsDarkTheme="True" --- Dark theme
• IsDarkTheme="False" --- Light theme (default)

Built-in theme toggle

ModernWindow includes a built-in button for switching between Dark and Light themes. The button is shown by default.

<ui:ModernWindow
    ...
    ShowThemeToggleButton="True">
</ui:ModernWindow>

To hide it:

<ui:ModernWindow
    ...
    ShowThemeToggleButton="False">
</ui:ModernWindow>

Using a standard WPF Window

If you are not using ModernWindow, merge Generic.xaml together with the theme you want to use.

Dark theme

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

Light theme

<ResourceDictionary>
  <ResourceDictionary.MergedDictionaries>
    <ResourceDictionary Source="/AtomicUI;component/Themes/LightTheme.xaml" />
    <ResourceDictionary Source="/AtomicUI;component/Themes/Generic.xaml" />
  </ResourceDictionary.MergedDictionaries>
</ResourceDictionary>

🔑 License Key

A license key is only required for paid licenses.

using AtomicUI;

public partial class App : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        ThemeManager.SetKey("MY-LICENSE-KEY");
        base.OnStartup(e);
    }
}

⚡ Custom Styles

AtomicUI styles native WPF controls automatically. If you override a control style and want to retain AtomicUI's styling, inherit from the existing style with BasedOn:

<TextBox>
    <TextBox.Style>
        <Style BasedOn="{StaticResource {x:Type TextBox}}"
               TargetType="{x:Type TextBox}">
            <Setter Property="FontSize" Value="18" />
        </Style>
    </TextBox.Style>
</TextBox>

This is standard WPF behaviour: defining a new style without BasedOn replaces the existing style.

For advanced scenarios such as dynamically loaded Prism views or isolated resource dictionaries, see the full documentation on GitHub.

📄 Licensing

AtomicUI.WPF uses a perpetual licensing model.

Personal & Indie --- Free

Free with no time limit for personal and hobby projects, independent developers, and commercial applications you develop and distribute independently. No guaranteed support is included.

Commercial licenses

Paid licenses are available for developers working for organisations or clients, development teams, and enterprise organisations.

See current plans and licensing details:
https://atomicapps.dev/pricing

AtomicUI.WPF is distributed as a compiled-only NuGet package.

📬 Support

• Discord: https://discord.gg/5QN4qyGP
• Email: dan@atomicapps.dev

🌐 Links

• Website: https://atomicapps.dev
• Full documentation & source repository: https://github.com/AtomicAppsUI/AtomicUI.WPF
• Gallery: https://apps.microsoft.com/detail/9PHND2W8WGG7?hl=en-us&gl=GB&ocid=pdpshare
• Pricing: https://atomicapps.dev/pricing