September 8, 2020-KB4570720 Cumulative Update Preview for .NET Framework 3.5 and 4.7.2 for Windows 10 Version 1809 and Windows Server 2019

Applies to: .NET

This update for Windows 10 Version 1809 and Windows Server 2019 includes cumulative reliability improvements in .NET Framework 3.5 and 4.7.2. 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 with a crash on COM interop to properly return the hresult for the Out of Memory Exception

- Improved support for cleaning up private temporary certificate keys

WPF2

- Improved spell checking so words like "etc." and "e.g." will no longer be identified as spelling errors when spell-checking is enabled in WPF TextBox or RichTextBox

- 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.
 
  • 4576627 Description of the Cumulative Update for .NET Framework 3.5, 4.7.2 and 4.8 for Windows 10 Version 1809 and Windows Server 2019 (KB4576627)

How to obtain and install the update


Install this update

This update will be downloaded and installed automatically from Windows Update.

To get the standalone package for this update, go to the Microsoft Update Catalog website.

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 4.7.2 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