Briefs

We’ve released PostSharp 2027.0.5-preview. The new PostSharp.Testing.AspectTesting package lets you test your aspects the way we test ours. The documentation now has an Errors and Warnings reference, with one article for each message. It also has 35 bug fixes, most of them in build-time messages and the pattern libraries, and 3 breaking changes in logging and threading. This is a preview release and is not supported in production. See the release notes.

We’ve released PostSharp 2026.0.19 and 2024.0.28 with 5 bug fixes, most of them build failures in assembly loading and binding on .NET Framework. PostSharp 2026.0.19 brings the 2024.0.28 fixes to the 2026.0 line. See the release notes for 2026.0.19 and 2024.0.28.

We’ve released PostSharp 2027.0.4-preview. Applications that use PostSharp can now be published with ReadyToRun, trimmed, or compiled ahead of time with NativeAOT, including the pattern libraries. It also has 19 bug fixes, most of them in the aspect framework, and brings the fixes of PostSharp 2026.0.19. This is a preview release and is not supported in production. See the release notes.

We’ve released Metalama 2027.0.4-preview, which introduces call-site interceptors. An aspect or a fabric can now redirect calls to selected methods to an existing method or to one generated from a template. It also has many other enhancements, more than 40 bug fixes and a few breaking changes. This is a preview release and is not supported in production. See the release notes.

We’ve released Metalama 2026.1.30 with 3 bug fixes. See the release notes.

We’ve released PostSharp 2027.0.3-preview, with more advice parameter binding improvements and 32 bug fixes, most of them in NotifyPropertyChanged and the threading models. It comes with PostSharp.AI.Skills, a plugin that gives Claude Code and Codex the PostSharp documentation. This is a preview release and is not supported in production. See the release notes.

We’ve released PostSharp 2027.0.2-preview. Advice parameter binding is now publicly supported, so an advice method can take only the values it needs as typed parameters instead of an AdviceArgs object. Aspects now also work on .NET 11 methods compiled with runtime async. It also has 4 bug fixes. This is a preview release and is not supported in production. See the release notes.

We’ve released Metalama 2026.1.29 with 17 bug fixes, most of them design-time. See the release notes.

We’ve released PostSharp 2027.0.1-preview, the first build of the 2027.0 line. It supports .NET 10 and .NET 11 and replaces the PostSharp Options application with a web-based interface and a postsharp command line tool, with several breaking changes. This is a preview release and is not supported in production. See the release notes.

We’ve released PostSharp 2026.0.18 and 2024.0.27 with 3 bug fixes, all of them about builds hitting transient file access errors, for example when another process or security software briefly locks an assembly. PostSharp 2026.0.18 brings the 2024.0.27 fixes to the 2026.0 line. See the release notes for 2026.0.18 and 2024.0.27.

We’ve released PostSharp 2026.0.17 and 2024.0.26 with a license verification security fix and 7 other bug fixes, most of them build failures or hangs when several projects are woven concurrently. Release notes are now published on the GitHub releases page only. PostSharp 2026.0.17 brings the 2024.0.26 fixes to the 2026.0 line. See the release notes for 2026.0.17 and 2024.0.26.

We’ve released Metalama 2027.0.3-preview, which lets aspects introduce structs, enums, delegates, records and C# 15 unions, and supports aspects applied to unions written in target code. This is a preview release and is not supported in production. See the release notes.

We’ve released Metalama 2026.1.28 with 4 bug fixes. See the release notes.

We’ve released Metalama 2027.0.2-preview, which moves to the .NET SDK 11.0.100-rc.1 and Roslyn 5.11 and enables the C# 15 language version. It adds code model and advising support for C# 15 unions, closed classes and extension indexers, and introduces type facets in the code model. This is a preview release and is not supported in production. See the release notes.

We’ve released Metalama 2026.1.27, updating the MessagePack library embedded in the design-time components to 2.5.302, which fixes two reported vulnerabilities (CVE-2026-48109 and CVE-2026-48516). It also has two design-time bug fixes. See the release notes.

We’ve released Visual Studio Tools for PostSharp and Metalama 2026.1.8. The extension itself is unchanged; this release updates the bundled Metalama.Backstage from 2026.1.24 to 2026.1.26, so Visual Studio picks up the configuration and licensing fixes of those versions. See the GitHub release.

We’ve released Metalama 2027.0.1-preview, the first build of the 2027.0 line. It supports the .NET SDK 11.0.100-preview.7 and ships Roslyn 5.10. This is a preview release and is not supported in production. See the release notes.

We’ve released Metalama 2026.1.26 with 8 bug fixes, most of them design-time. See the release notes.

Metalama won Silver in the Software Design, Frameworks, and Modeling Tools category of the 32nd Visual Studio Magazine Reader’s Choice Awards. It is Metalama’s first award, and the tenth consecutive edition in which readers voted for one of our products. Thank you to everyone who took the time to vote. See the announcement and the full results.

We’ve released Metalama 2026.1.25, which makes unattended and evaluation-mode builds work on macOS with .NET 11. It also improves the detection of continuous integration servers, makes an unlicensed build report LAMA0806 instead of failing with MSB4018, and fixes a design-time crash in fabrics. See the release notes.