.NET Framework May 2022 Cumulative Update

We are releasing the May 2022 Cumulative Update Preview Updates for .NET Framework.

Quality and Reliability

This release contains the following quality and reliability improvements.

WPF 1

• Addresses an issue where DWM failures can cause WPF’s render thread to fail. An app can opt-in to the behavior of ignoring all DwmFlush errors by setting a regkey in HKCUSoftwareMicrosoftAvalon.GraphicsIgnoreDwmFlushErrors or HKLMSoftwareMicrosoftAvalon.GraphicsIgnoreDwmFlushErrors whose name is the full path to the .exe that wants to opt-in, and whose DWORD value is 1.
• Addresses an issue of WPF apps not working with “Text Cursor Indicator” enabled when using RichTextBox.

Winforms

• Improved the hardened rendering of ComboBox controls on 64 bit architectures.
• Improved the reliability of data-bound ComboBox controls under assistive technology.

.NET Runtime

• Addresses several issues that would cause too many garbage collections under high memory load. The part of the change that reduces the number of blocking generation 2 collections under high memory load is considered a tuning change and is only active if the GCConserveMemory setting is set to a non-zero value. The part of the change that reduces needless generation 0 collections is considered an improvement and is always active.
• Adjusted GC Heap Hard Limit configuration, as well as processor interpretation for .NET Framework container scenarios.

Workflow

• Addresses an issue when users interact with the Workflow Designer they might encounter incorrectly disabled context menu items when right clicking on a variable in the component variables list.

1 Windows Presentation Foundation (WPF)

Getting the Update

The Cumulative Update Preview is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog.

Microsoft Update Catalog

You can get the update via the Microsoft Update Catalog. For Windows 10, NET Framework 4.8 updates are available via Windows Update, Windows Server Update Services, Microsoft Update Catalog. Updates for other versions of .NET Framework are part of the Windows 10 Monthly Cumulative Update.

Note: Customers that rely on Windows Update and Windows Server Update Services will automatically receive the .NET Framework version-specific updates. Advanced system administrators can also take use of the below direct Microsoft Update Catalog download links to .NET Framework-specific updates. Before applying these updates, please ensure that you carefully review the .NET Framework version applicability, to ensure that you only install updates on systems where they apply.

The following table is for Windows 10 and Windows Server 2016+ versions.

Previous Monthly Rollups

The last few .NET Framework Monthly updates are listed below for your convenience: