April 2, 2019 — KB4489192 Cumulative update for .NET Framework 3.5 and 4.7.2 for Windows 10, version 1809 and Windows Server 2019

Applies to: .NET Framework

Improvements and fixes


This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

  • Addresses an issue in which the Framework throws an exception if the year in the parsed date is greater than or equal to the start year of the next era. Now, the framework will not throw such exception.
  • Updates Japanese Era dates that are formatted for the first year in an era and for which the format pattern uses the “y年” characters. The format of the year together with the symbol “元” is supported instead of using year number 1. Also, formatting day numbers that include “元” is supported.
  • Allows the output of Gannen characters in Japanese Era formatting of first year dates regardless of whether the format pattern includes single quotation marks around the "年" character.

Known issues in this update


Microsoft is not currently aware of any issues in this update.

How to get this update


Install this update

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

This update will be downloaded and installed automatically from Windows Update. To get the standalone package for this update, go to the Microsoft Update Catalogwebsite.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4489192 for x64 and the file information for cumulative update 4489192 for x86.