August 20, 2020-KB4570722 Cumulative Update Preview for .NET Framework 3.5 and 4.8 for Windows 10 Version 1809 and Windows Server 2019

Applies to: .NET

The August 20, 2020 update for Windows 10 Version 1809 and Windows Server 2019 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.

Quality and reliability improvements


CLR1

- Addresses an issue in some 32 bit apps where, in certain scenarios, the JIT might omit a function call

- Improved support for cleaning up private temporary certificate keys

WPF2

- Addresses an issue with a null-reference crash in automation code, arising from re-entrancy when reconnection to a remote desktop.


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

Additional information about this update


The following articles contain additional information about this update as it relates to individual product versions.
  • 4571462 Description of the Cumulative Update Preview for .NET Framework 3.5, 4.7.2 and 4.8 for Windows 10 Version 1809 and Windows Server 2019 (KB4571462)

How to obtain and install the update


Install this update

Release Channel Available Next Step
Windows Update and Microsoft Update Yes

To download and install this update, go to Settings > Update & Security > Windows Update, and then select Check for updates.

Microsoft Update Catalog Yes To get the standalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS) No

You can import this update into WSUS manually. See the Microsoft Update Catalog for instructions.

File information

For a list of the files that are provided in this update, download the file information for cumulative update .

Prerequisites

To apply this update, you must have .NET Framework 3.5 or 4.8 installed.

Restart requirement

You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

How to obtain help and support for this update