Microsoft is pleased to announce that in the coming weeks, the .NET Framework 4.8.1 product will be widely available on Windows Update (WU) and Microsoft Update Catalog for supported versions of Windows. The .NET Framework 4.8.1 product will first roll out to customers participating in the Windows Insider Program through the Release Preview channel, then gradually to customers looking for the latest content on WU, and finally as "Recommended" for customers through Windows Update.
.NET Framework 4.8.1 will be available for the following Windows versions and distribution channels:
- Windows Update: Windows 11 21H2, Windows 10 21H2 (LTSC), and Windows 10 22H2
- Microsoft Update Catalog: Windows 11 21H2, Windows 10 21H2 (LTSC), Windows 10 22H2 and Windows Server 2022 (Desktop, Azure Editions), Azure Stack 21H2 and Azure Stack 22H2.
Note: Customers using Windows Server Updates Services (WSUS) or any other update management tool will be able to import the .NET Framework 4.8.1 product from Microsoft Update Catalog. Also note that .NET Framework 4.8.1 is already included by default in new versions of Windows, starting with Windows 11 22H2.
What's new in .NET Framework 4.8.1?
.NET Framework 4.8.1 includes native support for the Arm64 architecture (Windows 11+) and accessibility enhancements and other enhancements. You can see the full list of improvements in the .NET Framework 4.8.1 Release Notes.
Native Arm64 Support
.NET Framework 4.8.1 adds native Arm64 support to the .NET Framework family. So your investments in the vast ecosystem of .NET Framework applications and libraries can now take advantage of running workloads natively on Arm64 for better performance compared to running emulated x64 code on Arm64.
Accessible WCAG2.1 Compliant Tooltips
Microsoft is committed to providing products and platforms that are accessible to everyone. The .NET Framework 4.8.1 provides two Windows UI development platforms, both of which provide developers with the support needed to create accessible applications for their users. In recent releases, Windows Forms and WPF have added several features and fixed many reliability issues related to accessibility.
In this release, Windows Forms and WPF have made improvements to how tooltips are handled to make them more accessible. In both cases, tooltips now conform to the guidelines set out in the WCAG2.1 guide on content on hover or focus . Tooltip requirements are as follows:
- Les infobulles doivent s'afficher soit au survol de la souris, soit en cas de navigation au clavier vers le contrôle.
- Les infobulles doivent pouvoir être supprimées. En d'autres termes, une simple commande clavier telle que la touche ESC doit permettre de supprimer l'infobulle.
- Les info-bulles doivent pouvoir être survolées. Les utilisateurs doivent pouvoir placer le curseur de leur souris sur l'infobulle. Cela permet, par exemple, aux utilisateurs malvoyants d'utiliser une loupe pour lire l'info-bulle.
- Tooltips should be persistent . Tooltips should not automatically disappear after some time. Rather, they should disappear when the user moves their mouse to another control or when they remove the tooltip as described above.
In WinForms, this support is only available on Windows 11 or higher operating system. WinForms is a finely managed wrapper around the Windows API, and the new tooltip behavior is only available since Windows 11. WPF does not depend on the OS version for its accessible tooltips.
WPF implemented most WCAG2.1 compliant tooltip requirements in .NET Framework 4.8. In this release, WPF has improved the experience by ensuring that a tooltip in the current window can be easily removed using the ESC key, the CTRL key (alone) or the Ctrl+Shift+F10 combination. The scope of the Esc key has been reduced in this release to only apply to the current window, whereas previously it applied to any tooltip open in the application.
Windows Forms - Accessibility Improvements
Windows Forms was the first Windows UI stack created for the .NET Framework. As such, it was originally created to use legacy accessibility technology, which does not meet current accessibility requirements. In this release, WinForms has fixed a number of issues. For a complete list of accessibility-related changes, see What's New in Accessibility in the .NET Framework .
This section focuses on the major new features of WinForms in .NET Framework 4.8.1.
- Prise en charge des motifs de texte - Dans cette version, WinForms a ajouté la prise en charge du motif de texte UIA. Ce modèle permet aux technologies d'assistance de parcourir lettre par lettre le contenu d'une TextBox ou d'un contrôle textuel similaire. Il permet de sélectionner et de modifier le texte à l'intérieur du contrôle, ainsi que d'insérer un nouveau texte au niveau du curseur. WinForms a ajouté cette prise en charge pour les contrôles TextBox, DataGridView, ComboBox, etc.
- Résolution des problèmes de contraste - Les problèmes de contraste dans plusieurs contrôles ont été résolus et le rapport de contraste des rectangles de sélection a été modifié pour qu'ils soient plus sombres et plus visibles.
- Correction de plusieurs problèmes liés aux DataGridView - Dans cette version, les noms des barres de défilement ont été mis à jour afin d'être cohérents. Le problème de l'impossibilité pour Narrator de se concentrer sur les cellules vides de DataGridView a été résolu. Les développeurs peuvent désormais définir la propriété de type de contrôle localisé pour les cellules DataGridView personnalisées. La couleur du lien pour les cellules DataGridViewLink a été mise à jour pour mieux contraster avec l'arrière-plan.
Problèmes connus
The .NET Framework 4.8.1 product installers will also be updated to include all the latest security and quality fixes since the initial release of .NET Framework 4.8.1.
How can I get .NET Framework 4.8.1?
The .NET Framework 4.8.1 can be downloaded from: Download .NET Framework | Free official downloads (microsoft.com) for supported Windows versions. It is also included in Visual Studio 17.3 and Windows 11 22H2, and their corresponding newer versions.
Very soon, .NET Framework 4.8.1 will also be available on Windows Update and Microsoft Update Catalog as follows:
- Les participants au programme Windows Insider qui ont enregistré leur appareil dans le canal Release Preview seront les premiers à recevoir la dernière version du produit .NET Framework 4.8.1 en tant que Recommended.
- Peu après, les utilisateurs de Windows Update Seekers pourront installer le .NET Framework 4.8.1 en recherchant les dernières mises à jour (Démarrer > Paramètres > Windows Update > Rechercher les mises à jour). La disponibilité des mises à jour sera limitée progressivement aux appareils connectés à Windows Update.
- Enfin, les versions prises en charge du client Windows recevront le .NET Framework 4.8.1 en tant que mise à jour recommandée sur Windows Update.
- Les administrateurs informatiques pourront également télécharger directement le .NET Framework 4.8.1 ou l'importer dans WSUS à partir de Microsoft Update Catalog.
Additional Information
Language Packs
.NET Framework 4.8.1 language packs will also be available on Windows Update and Microsoft Update Catalog for customers who are using localized versions of Windows that are not in English or who have one or more language packs installed. multilingual user interface (MUI).
Blocking automatic deployment of .NET Framework 4.8.1
Enterprises may have client devices that connect directly to public Windows Update servers. In this case, an administrator may want to prevent the deployment of .NET Framework 4.8.1 to these client machines so that they can test internal applications before deploying them.
In such scenarios, administrators can deploy a registry key setting and prevent .NET Framework 4.8.1 from being offered to these devices. More information on using this blocking registry key can be found in Microsoft Knowledge Base article KB5027101 : How to temporarily block the installation of the .NET Framework 4.8.1.
Source: Microsoft
And you?
What do you think ?
What do you see as the benefits of making .NET Framework 4.8.1 available on Windows Update and Microsoft Update Catalog?
إرسال تعليق