Microsoft Releases .NET 11 RC1 with Go-Live Support, C# 15 and F# 11
Last week, Microsoft has released .NET 11 Release Candidate 1, the first release candidate of the cycle, shipping with a go-live support license for production.
By Dillip Chowdary • Sep 17, 2026 • Source: InfoQ
What Microsoft .NET 11 RC1 with Go-Live Support shipped
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InfoQ reports: Microsoft Releases .NET 11 RC1 with Go-Live Support, C# 15 and F# 11 as Default Language Versions. Last week, Microsoft has released .NET 11 Release Candidate 1, the first release candidate of the cycle, shipping with a go-live support license for production use. The release makes C# 15 and F# 11 the default language versions, extends dotnet test to mobile and desktop targets, finalizes the SignalR authentication…
How to install or upgrade Microsoft .NET 11 RC1 with Go-Live Support
For primary quotes and complete technical detail, see InfoQ's original report linked above.
Developer Action Items
- ☐ Diff the official changelog for Microsoft before you bump — APIs, defaults, and removed flags only.
- ☐ Install through the vendor's documented channel in staging; keep a one-command rollback and time-box the canary.
- ☐ Grep your repo for old flag names, lockfile pins, and plugin versions that the notes mark as breaking.
- ☐ Prefer the first patch cut over the day-zero tag unless you have a reason to be on the leading edge.
- ☐ If InfoQ did not name a region, plan, or SKU, screenshot the official availability line before you promise it to users.
Author
Dillip Chowdary
Writes Tech Bytes coverage of AI, engineering, and the tools that actually ship. Editor of Tech Pulse Daily.
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