Today, we are releasing the November 2020 Cumulative Update Preview for .NET Framework.

Quality and Reliability

This release contains the following quality and reliability improvements.

CLR

• 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 Cumulative Update Preview is available via Windows Update 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 and Microsoft Update Catalog.

**Note**: Customers that rely on Windows Update 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 2019+ versions.

Previous Monthly Rollups

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

• • .NET Framework November 2020 Security and Quality Rollup Updates
  • .NET Framework October 2020 Cumulative Update Preview for Windows 10 2004 and Windows Server, version 2004
  • .NET Framework October 2020 Cumulative Update Preview Update