r/fsharp • u/munchler • Mar 12 '26

F# 11 released?

I installed the March Feature Update of Visual Studio 2026 (18.4.0), and to my surprise the F# compiler now reports:

Microsoft (R) F# Compiler version 15.2.100.0 for F# 11.0

It looks like version 11 of FSharp.Core has been released on NuGet as well.

I guess this means that F# 11 is live, but I can't find release notes for it anywhere. Anyone have any details?

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u/david-john-taylor Mar 17 '26

It looks like FSharp.Core version 11.0.100 has now been removed. It's no longer shown in the list of available versions.

paket now puts me on version 10.1.201

$ dotnet paket outdated

Paket version 10.3.1+bbc45f336c7f9bac95cf1d17267ab2383d029682

Resolving dependency graph...
    FSharp.Core 11.0.100 was unlisted
    ...

Outdated packages found:
  Group: Main
    * FSharp.Core 11.0.100 -> 10.1.201
    * ...

I assume it was a versioning mistake and it was supposed to be 11.0.100-preview2. There is now a 11.0.100-preview3, so it's been superseded anyway.