May 24, 2023 - KB5026515 Cumulative Update Preview for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2
The May 24, 2023 update for Windows 11, version 22H2 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the
Prerequisites and
Restart requirement sections.
Summary
Security Improvements
There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.
Quality and Reliability Improvements
| WPF1 | - Addresses ArgumentNullException that can arise in apps, or libraries, that directly set the IsOpen property on ToolTips or their Popups.
- Addresses an issue to avoid ArgumentOutOfRangeException when ControlTemplate has two or more ItemsPresenter sharing a single ItemsCollection. |
| SQL Connectivity | - Addresses an issue where SQL connection created is not terminated by the library when this error is thrown or is leaked in the client application. |
1Windows Presentation Foundation (WPF)
Known issues in this update
Microsoft is not currently aware of any issues in this update.
How to get this update
Install this update
| Release Channel | Available | Next Step |
| Windows Update and Microsoft Update | Yes | To get the package for this update, go to Settings > Windows Update > Advanced options > Optional updates page and selecting the update from the list. |
| Windows Update for Business | No | None. These changes will be included in the next security update to this channel. For more information about Windows Update for Business go to the Windows Update for Business website. |
| Microsoft Update Catalog | Yes | To get the standalone package for this update, go to the Microsoft Update Catalog website. |
| Windows Server Update Services (WSUS) | No | You can import this update into WSUS manually. See the Microsoft Update Catalog for instructions. |
File information
For a list of the files that are provided in this update, download the
file information for cumulative update.
Prerequisites
To apply this update, you must have .NET Framework 3.5 or 4.8.1 installed.
Restart requirement
You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.
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