We are pleased to announce the release of .NET 9 Preview 3.

[trinhtuanvy1988]

We are pleased to announce the release of .NET 9 Preview 3.

Here's a summary of what's new in .NET Libraries, Runtime, & SDK in this preview release:

• TimeSpan.From overloads
• Added PersistableAssemblyBuilder type in System.Reflection.Emit
• Faster exception handling
• Inlining Improvements: Shared Generics with Runtime Lookups
• Terminal Logger Usability

For details on these new features and more see the

• .NET Libraries Release Notes
• .NET Runtime Release Notes
• .NET SDK Release Notes

You can find detailed release notes for additional features in .NET 9 Preview 3 below:

• .NET Data & EF Core
• .NET MAUI
• ASP.NET Core

You can re-use and re-mix release notes per license information.

Get started

To get started with .NET 9, install the .NET 9 SDK.

If you're on Windows using Visual Studio, we recommend installing the latest Visual Studio 2022 preview, or get started with Visual Studio Code and the C# Dev Kit extension.

You can find .NET 9 Preview 3 Installer & Binaries on GitHub.

Team Announcements & Discussions

Discuss this release with the product teams on GitHub through the announcements for this release.

• .NET MAUI
• ASP.NET Core
• Libraries & Runtime
• Containers
• Source-build

Stay up-to-date with .NET 9

You can stay up-to-date with all the features of .NET 9 with:

• What's new in .NET 9
• What's new in ASP.NET Core
• What's new in .NET MAUI
• What's new in EF Core
• Breaking Changes in .NET 9
• .NET 9 Releases

For .NET 9 previews we are utilizing GitHub Discussions to make announcements. For more information read our discussion.

Stay up to date by subscribing to the RSS feed for all release announcements.

You can find a full list of release notes and discussions for all preview releases in the Release Index thread.

Originally posted by @jamesmontemagno in #9271

[jamesmontemagno]

Core announcements are made https://github.com/dotnet/announcements and for discussions in GitHub Discussions News category: https://github.com/dotnet/core/discussions/categories/news please do not re-post.