F# Weekly #41, 2025 – JetBrains .NET Days Online 2025

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Preparing for the .NET 10 GC (DATAS) – .NET Blog
• Developer and AI Code Reviewer: Reviewing AI-Generated Code in .NET – .NET Blog
• September 2025 (version 1.105)
• Visual Studio Dev/Test Benefit Explained – Visual Studio Blog
• Developer and AI Code Reviewer: Reviewing AI-Generated Code in .NET – .NET Blog

It's not too late to join the #JetbrainsDotnetDays2025 and come and find out why functional programming in #fsharp is either a passing fad or absolutely fabulous!blog.jetbrains.com/dotnet/2025/…Many thanks to @jetbrains.com for organising this!

— Ken Bonny (@kenbonny.net) 2025-10-09T09:08:20.299Z

Videos

• .NET Days Online 2025, Day 1: Aspire, Clean Architecture, C# Nullability, Messaging, Uno, Blazor TDD
• .NET Days Online 2025, Day 2: Event-Driven Systems & GenAI with Aspire, F#, dotMemory, and More.
• ASP.NET Community Standup – Razor Reloaded
• .NET AI Community Standup – Getting Started with the Microsoft Agent Framework – YouTube
• On .NET Live | Simplifying API Design with the REPR Pattern and FastEndpoints – YouTube

Blogs

• Study notes: Softmax function · Mathias Brandewinder blog
• Tips for Unit Testing Fable Apps using .NET | Jordan Marr

Blog post: Tips for unit testing #fsharp Fable apps using .NET:jordanmarr.github.io/fsharp/unit-…

— Jordan Marr (@jordanmarr.bsky.social) 2025-10-05T19:37:16.866Z

F# vNext

• `MatchFailure`/`MatchSkip` patterns · Issue #1448
• System.Text.Json : Consider supporting F# discriminated unions · Issue #55744 · dotnet/runtime

Highlighted projects

• alexzzzs/SharpParser.Core: A beginner-friendly, event-driven F# parsing library for language design and implementation.
• LiteracyFanatic/kensaku: Quick and easy search for Japanese kanji, radicals, and words
• reallukee/confole: 🎨 Abbellisci la tua app console F# in modo funzionale
• ChrisPritchard/Xelmish: XNA + Elmish – 2D game development framework with F#
• WyattTechnology/WAkka: F# interface for Akka.NET
• speakeztech/fs-fileshare: A Cloudflare-based file sharing solution built with F#, Fable and deployed into Cloudflare
• speakeztech/CloudflareFS: Toolkit for building modern Cloudflare Solutions with F# and Fable Compiler

New Releases

• ResizeArrayT 0.25.0
• Str 0.20.0
• Dicts 0.5.0
• ArrayT 0.24.0
• Fesh 0.28.1
• Farmer 1.9.22
• Akka.FSharp 1.5.53
• SharpParser.Core 1.2.0
• FarNet.FSharpFar 5.1.5
• FSharp.Idioms 1.4.36
• Jade.Marten 2.0.1
• Reallukee.Confole 1.1.0
• Farse 0.5.2
• xelmish 1.0.0.1
• fsharp-gamecore 1.0.0.1
• astar-search 1.0.3
• WAkka 1.5.4
• SharpVG 0.0.20
• TypeEquality 0.4.2
• Partas.Solid 2.1.3
• DbFlow 0.5.1
• FsHttp 15.0.3
• Kensaku.DataSources 0.1.0-preview.2
• Feliz 3.0.0-rc.2
• Feliz.Template 5.0.0-rc.3
• Swate.Components 1.0.0-rc.8

That’s all for now. Have a great week.

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