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KB5050579

KB5050579: Cumulative update for .NET Framework, versions 3.5 and 4.8, on Windows 10 22H2, January 2025. Large WPF print jobs get an opt-in memory fix

In short

An opt-in WPF change addresses failures when printing many pages because of an out-of-memory exception. Apps must enable it in their configuration.

Does it affect you? Applies to: Devices running Windows 10, version 22H2, with .NET Framework 3.5 or 4.8 installed.

File version
2.0.50727.9179 · 4.8.4777.0
Restart
Required

What changes

Fix 1 change

WPF

Verified in package

For: Apps that use WPF for large print jobs

  • The opt-in change addresses failures when printing many pages because of an out-of-memory exception.1
    Enable the fix by adding <runtime><AppContextSwitchOverrides value="Switch.System.Windows.Controls.ReleaseDiscardableFontReasources=true"/></runtime> to the app.config file.

Technical details

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

Data sheet

Released
2025-01-28
Classification
Updates
Type
Cumulative update
Restart
Required
VersionFile versionChannel
3.5 2.0.50727.9179 General availability
4.8 4.8.4777.0 General availability

Security

No vulnerabilities are listed for this update.

Updated components

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

Top changed componentsFiles
WPF36

Verified in package: changed files confirm WPF.

Sources

Updated
Cited passages from Microsoft's official notes (1)
  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 8, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

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