.NET Framework – March 2024 Cumulative Update Preview

Salini Agarwal

Today, we are releasing the March 2024 Cumulative Update Preview Updates for .NET Framework.

Quality and Reliability

This release contains the following quality and reliability improvements.

.NET Runtime
  • Addresses an issue when thread pool recycled lists become unresponsive on multi-CPU-group computers.
  • Addresses an issue where Interlocked.Read from 32-bit apps are much slower on some computers.
.NET Libraries
  • Addresses a performance issue in ASP.NET applications after installing the January 2024 .NET Framework update.
.NET Compilers
  • Addresses an issue when using the native C# compiler (csc.exe) to compile code making calls to COM interop assemblies.

Getting the Update

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

Customers using Windows 11, version 22H2 and Windows 11, version 23H2, you will now find .NET Framework updates on the Settings > Windows Update > Advanced options > Optional updates page.

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+ versions.

Product Version Cumulative Update
Windows 11, version 23H2
.NET Framework 3.5, 4.8.1 Catalog 5036035
Windows 11, version 22H2
.NET Framework 3.5, 4.8.1 Catalog 5036581
Windows 10, version 22H2 5036580
.NET Framework 3.5, 4.8 Catalog 5036036
.NET Framework 3.5, 4.8.1 Catalog 5036034

The operating system row lists a KB which will be used for update offering purposes. When the operating system KB is offered, the applicability logic will determine the specific .NET Framework update(s) will be installed. Updates for individual .NET Framework versions will be installed based on the version of .NET Framework that is already present on the device. Because of this the operating system KB is not expected to be listed as installed updates on the device. The expected update to be installed are the .NET Framework specific version updates listed in the table above.


Previous Monthly Rollups

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

1 comment

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  • Alberto Chirinos 0

    Thanks for the information!

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