September 15, 2026•1 min read•from InfoQ

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 refresh APIs, and improves Android build times in .NET MAUI.

By Almir Vuk

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Tagged with

#.NET 11

#Release Candidate 1

#C# 15

#F# 11

#dotnet test

#SignalR

#authentication

#.NET MAUI

#mobile targets

#desktop targets

#Android build times

#go-live support

#production use

#API

#Microsoft

#language versions

#release cycle

#refresh APIs

#build times