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Windows UI Library: the latest Windows 10 native controls and Fluent styles for your applications
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README.md

Windows UI Library

The Windows UI Library (WinUI) provides official native Microsoft UI controls and features for Windows UWP apps.

WinUI is the easiest way to build great Fluent Design experiences for Windows.

WinUI can be used in any Windows 10 UWP XAML app, or in a Xamarin.Forms app running on Windows 10 using native view embedding.

Using WinUI

You can download and use WinUI packages in your app using the NuGet package manager: see the Getting Started with the Windows UI Library page for more information.

Packages

NuGet Package Build Status Latest Versions Documentation
Microsoft.UI.Xaml
Controls and Fluent Design for UWP apps
Build Status latest stable version
latest prerelease version
2.0 release
2.1 prerelease
Microsoft.UI.Xaml.Core.Direct
Low-level APIs for middleware components
latest prerelease version 2.0 prerelease

You can also build a WinUI package yourself from source. See Contributing to the Windows UI Library for more information on building and contributing to WinUI.

Documentation

WinUI usage documentation can be found here:
https://docs.microsoft.com/uwp/toolkits/winui

Release notes for Microsoft.UI.Xaml WinUI packages can be found here:
https://docs.microsoft.com/uwp/toolkits/winui/release-notes/

To view the WinUI controls in an interactive format, check out the Xaml Controls Gallery:

Contributing to WinUI

The WinUI team welcomes feedback and contributions!

For information on how to contribute please see Contributing to the Windows UI Library.

WinUI features

Benefits

The WinUI Library provides some useful benefits when building apps for Windows 10:

  1. Helps you stay up to date
    WinUI helps keep your app up to date with the latest versions of key controls and features of UWP XAML and the Fluent Design System

  2. Provides backward compatibility
    WinUI is backward-compatible with a wide range of Windows 10 versions: you can start building and shipping apps with new XAML features immediately as soon as they're released, even if your users aren't on the latest version of Windows 10

  3. Makes it simpler to build version adaptive apps
    You don't need version checks or conditional XAML markup to use WinUI controls or features: WinUI automatically adapts to the user's OS version

Version support

The Microsoft.UI.Xaml NuGet package requires your project to have TargetPlatformVersion >= 10.0.17134.0 and TargetPlatformMinVersion >= 10.0.14393.0 when building.

Your app's users can be on any of the following supported Windows versions:

  • Windows Insider Previews
  • October 2018 Update (17763)
  • April 2018 Update (17134)
  • Fall Creators Update (16299)
  • Creators Update (15063)
  • Anniversary Update (14393)

Some features may have a reduced or slightly different user experience on older versions, particularly on builds before 15063. This should not impact overall usability.

Contents

The Microsoft.UI.Xaml 2.0 stable package includes:

Prerelease Microsoft.UI.Xaml packages also include previews of features and controls that we are still working on, like:

The Microsoft.UI.Xaml.Core.Direct package includes:

  • XamlDirect and related APIs to improve performance for middleware components

Roadmap

For info on the WinUI release schedule and high level plans please see the Windows UI Library Roadmap.

Data/Telemetry

This project collects usage data and sends it to Microsoft to help improve our products and services. Read Microsoft's privacy statement to learn more.

For more information on telemetry implementation see the developer guide.

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