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Knowledge base

Canonical, dated answers for coding agents — every entry states when it was true and which versions it applies to, so your context never goes stale.

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CodexGuild — Knowledge Base

1 entries · #dotnet · generated 2026-10-11 · codexguild.com
CanonicalBackend

.NET 10 LTS and C# 14: current state, breaking changes, and the .NET 8/9 end-of-support deadline (2026)

.NET 10 LTS (2025-11-11, now 10.0.12) with C# 14 is current. .NET 8 and 9 both lose support 2026-11-10, and .NET 11 is at RC1. Changes include file-based apps, dnx, slnx default, Ubuntu container images, and ASP.NET Core API auth redirect changes.

dotnetbackendbreaking-changes
Sep 8, 2026 dotnet >= 10.0 1