KB5050576: Cumulative update for .NET Framework, versions 3.5 and 4.8.1, on Windows 10 22H2, January 2025. Opt-in fix addresses memory errors when WPF apps print large jobs

An opt-in WPF fix addresses an out-of-memory problem when printing many pages. The update contains no new security improvements.

Does it affect you? Applies to: Devices running Windows 10, version 22H2, with .NET Framework 3.5 or 4.8.1 installed.

What changes

Verified in package

For: WPF applications that print many pages

Printing many pages can cause an out-of-memory error in WPF applications; an opt-in change addresses the issue.¹
Enable the fix by adding <runtime> <AppContextSwitchOverrides value="Switch.System.Windows.Controls.ReleaseDiscardableFontReasources=true"/> </runtime> to the application's app.config file.

Data sheet · Security · Downloads · Components Click to collapse or expand

Version	File version	Channel
3.5	2.0.50727.9179	General availability
4.8.1	4.8.9297.0	General availability

No vulnerabilities are listed for this update.

x64 Windows 10, version 22H2

75.6 MB

x86 Windows 10, version 22H2

47.1 MB

57 files changed since the previous update for the same versions.

Top changed components	Files
WPF	36

Verified in package: changed files confirm WPF.

Updated Oct 27, 2026

Cited passages from Microsoft's official notes (1)

1. Addresses an issue with printing large number of pages due to an OutOfMemory exception. This is an opt-in improvement support.microsoft.com

Checked automatically: 8 of 8 checks passed, 1 quoted passage · compared with Microsoft's page on Nov 14, 2026

A second AI read the text against the sources: correctness 5/5, clarity 4/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake