Programming language: C#
Tags: GUI    
Latest version: v2.4.0-prerelease.200203002

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Windows UI Library

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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.

WinUI Community Calls

The WinUI community call is your monthly opportunity to learn about native UX development for Windows with WinUI.

In these calls we’ll discuss the WinUI roadmap, our status and your feedback.

You can watch them online here on YouTube at the Windows Developer channel.

Add the event to your calendar: ICS calendar file

WinUI 3.0 Alpha (February 2020)

As outlined in the [roadmap](docs/roadmap.md) we're currently working on WinUI 3.0, which will greatly expand the scope of WinUI to include the full native Windows UI platform.

You can now download an early build of WinUI 3.0 Alpha to try out - we'd love your feedback!

For more info see the discussion issue #1965.

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.


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 2.3 release
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](CONTRIBUTING.md) for more information on building and contributing to WinUI.


WinUI usage documentation:

Release notes:

Sample code:
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](CONTRIBUTING.md).

WinUI features


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 2.3 NuGet package requires your project to have TargetPlatformVersion >= 10.0.18362.0 and TargetPlatformMinVersion >= 10.0.15063.0 when building.

Your app's users can be on any of the following supported Windows 10 versions:

  • Windows Insider Previews
  • May 2019 Update (18362 aka "19H1")
  • October 2018 Update (17763 aka "Redstone 5")
  • April 2018 Update (17134 aka "Redstone 4")
  • Fall Creators Update (16299 aka "Redstone 3")
  • Creators Update (15063 aka "Redstone 2")

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.


For info on the WinUI release schedule and high level plans please see the [Windows UI Library Roadmap](docs/roadmap.md).


This project collects usage data and sends it to Microsoft to help improve our products and services. See the [privacy statement](privacy.md) for more details.

For more information on telemetry implementation see the [developer guide](docs/developer_guide.md#Telemetry).