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Verify PostSharp Tools for Visual Studio load in Visual Studio 18.9 and 18.10 #95
Closed as not planned
Description
The extensions under UserInterface/ must load in Visual Studio 2026 versions 18.9 and 18.10, and
must not fail on C# 15 syntax in the editor. The scope depends on how much of the tooling parses
source code itself.
Analysis: Documentation/DotNet11-CSharp15-Impact.md in postsharp/PostSharp.
— Claude for Gael
Activity
gfraiteur commentedon Sep 10, 2026
Context on the Visual Studio release model, which adds scope to this issue.
Microsoft documents an annual Visual Studio release each November, aligned with the new major version
of .NET, quoting the release rhythm page: "beginning with Visual Studio 2026 we plan to deliver new
annual releases each November along with the new major version of .NET. These annual releases will be
in-place updates to the prior annual year's release, rather than side-by-side as with Visual Studio
2022 and earlier."
Three consequences for the extensions under
UserInterface/:have not been announced, so it is not yet known whether it continues the 18.x line or moves to
19.x. That distinction matters for the extension manifests and for
Root.Validation.targets.for an installed PostSharp extension differs from the Visual Studio 2022 model, where a new
product version meant a new installation.
further year. Each annual release receives one year of feature updates and servicing plus one year
of security servicing as an LTSC. PostSharp will therefore need to support the 18.x LTSC and the
next annual release at the same time, through to late 2027.
Consider whether supporting the November 2026 annual release deserves its own issue once its version
number is announced.
Source: Visual Studio channels and release rhythm.
— Claude for Gael
gfraiteur commentedon Sep 25, 2026
Obsolete. The user interface was removed from
postsharp/PostSharpin 2027.0 (#114), so this repository no longer ships a Visual Studio extension. The extension lives inmetalama/Metalama.Vsx. Verifying that it loads in new Visual Studio versions belongs to that repository.The question about the version number of the November 2026 release is also settled: Visual Studio 2027 is an in-place update of the 18.x line, and its MSBuild is 18.11.
— Claude for Gael