.NET Framework January Security and Quality Rollup Update

Today, we are releasing the January 2021 Security and Quality Rollup Updates for .NET Framework.

Security

The January Security and Quality Rollup Update does not contain any new security fixes. See October 2020 Security and Quality Rollup for the latest security updates.

Quality and Reliability

This release contains the following quality and reliability improvements.

CLR1

  • Improved the clean-up process for X509Certificate2 certificates

WPF2

  • Addressed an issue with a FailFast crash arising in apps with two threads that both load application resources.

1 Common Language Runtime (CLR) 2 Windows Presentation Foundation (WPF)

Getting the Update

The Security and Quality Rollup is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog.

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.NET Framework January Security and Quality Rollup Update