# F# Weekly #20, 2023 – .NET 8 Preview 4 **URL:** \ **Category:** General\ **Tags:** news\ **Created:** [May 20, 2023, 6:30pm UTC](https://forums.fsharp.org/t/f-weekly-20-2023-net-8-preview-4/3100 "2023-05-20T18:30:22Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![sergey\_tihon](https://yyz2.discourse-cdn.com/flex030/user_avatar/forums.fsharp.org/sergey_tihon/32/25_2.png) [@sergey\_tihon](https://forums.fsharp.org/u/sergey_tihon)\ **Post date:** [May 20, 2023, 6:30pm UTC](https://forums.fsharp.org/t/f-weekly-20-2023-net-8-preview-4/3100/1 "2023-05-20T18:30:22Z")
Welcome to F# Weekly, A roundup of F# content from this past week: **News** - [JetBrains .NET Day Online 2023: Call for Speakers @ Sessionize.com](https://sessionize.com/jetbrains-net-day-online-2023/) - [GitHub Next | GPT-4 with Calc](https://githubnext.com/projects/gpt4-with-calc/#s=1) - [Announcing .NET 8 Preview 4 - .NET Blog (microsoft.com)](https://devblogs.microsoft.com/dotnet/announcing-dotnet-8-preview-4/) - [ASP.NET Core updates in .NET 8 Preview 4 - .NET Blog (microsoft.com)](https://devblogs.microsoft.com/dotnet/asp-net-core-updates-in-dotnet-8-preview-4/) - [Get started with ChatGPT in .NET - .NET Blog (microsoft.com)](https://devblogs.microsoft.com/dotnet/get-started-chatgpt-azure-dotnet/) - [Object Detection in ML.NET Model Builder - .NET Blog (microsoft.com)](https://devblogs.microsoft.com/dotnet/object-detection-ml-dotnet-model-builder/) - [Hot Reload Supports Modifying Generics! - .NET Blog (microsoft.com)](https://devblogs.microsoft.com/dotnet/hot-reload-generics/) - [Client Support for Calling WCF/CoreWCF with System.ServiceModel 6.0 Is Here! - .NET Blog (microsoft.com)](https://devblogs.microsoft.com/dotnet/wcf-client-60-has-been-released/) - [EF Core 8 Preview 4: Primitive collections and improved Contains - .NET Blog (microsoft.com)](https://devblogs.microsoft.com/dotnet/announcing-ef8-preview-4/) - [The RedMonk Programming Language Rankings: January 2023 – tecosystems](https://redmonk.com/sogrady/2023/05/16/language-rankings-1-23/) > **F# Videos and Slides** - [Fast F#: Writing a Dictionary - Struct of Array Layout - YouTube](https://www.youtube.com/watch?v=raQsYNR4GMk&ab_channel=FastF%23) - [F# Tutorial: Using the Array.collect function - YouTube](https://www.youtube.com/watch?v=NdCl6wbG-6U&ab_channel=NiklasOPF) - [F# Tutorial: Introducing the Choice type - YouTube](https://www.youtube.com/watch?v=YITgA88sjSs&ab_channel=NiklasOPF) - [F# Tutorial: Exception handling with the Result type - YouTube](https://www.youtube.com/watch?v=yLZwa77iLCU&ab_channel=NiklasOPF) - [F# Tutorial: Upcasting types to the "obj" type - YouTube](https://www.youtube.com/watch?v=mA0G04Ia0Ok&ab_channel=NiklasOPF) - [F# Tutorial: Type tests via pattern matching - YouTube](https://www.youtube.com/watch?v=K8YuvHmVrLU&ab_channel=NiklasOPF) - [F# Tutorial: Automatic upcasting - YouTube](https://www.youtube.com/watch?v=tUIuWSYB3MY&ab_channel=NiklasOPF) - [F# Tutorial: Introducing the actor model - YouTube](https://www.youtube.com/watch?v=1ymHmM-CNoU&ab_channel=NiklasOPF) - [Why using Fable is too difficult. Prelude To the VN Compiler series. - YouTube](https://www.youtube.com/watch?v=skHA9ejpDMk&ab_channel=MarkoGrdinic) - [VN Compiler. How to post a chapter with images on Royal Road. Intro to React Flow. (Pt. 1) - YouTube](https://www.youtube.com/watch?v=dNEmo6o0dhM&ab_channel=MarkoGrdinic) - [VN Compiler. How to implement a context menu with DaisyUI and React Flow. (Pt. 2) - YouTube](https://www.youtube.com/watch?v=bdbhKEhHr4k&ab_channel=MarkoGrdinic) - [VN Compiler. Custom nodes with React Flow and DaisyUI (Pt. 3) - YouTube](https://www.youtube.com/watch?v=wrXO0CaVr4c&ab_channel=MarkoGrdinic) **.NET Videos** - [Use Azure Container Apps to build, deploy, diagnose, and monitor your .NET apps - YouTube](https://www.youtube.com/watch?v=SFzudOxYV_4&ab_channel=AzureDevelopers) - [Awesome Productivity Features for .NET API Development in Visual Studio - YouTube](https://www.youtube.com/watch?v=yDO6hCZM9yc&ab_channel=dotnet) - [ASP.NET Community Standup - Visual Studio Updates for JavaScript & TypeScript - YouTube](https://www.youtube.com/watch?v=tYEH06hnpWQ&ab_channel=dotnet) - [Using Copilot with C# - YouTube](https://www.youtube.com/watch?v=VsUQlSyQn1E&ab_channel=VisualStudioCode) **Blogs** - [[Release][CloudSeed]: Faster, simpler routing with F# / Giraffe](https://hamy.xyz/labs/2023-05-release-cloudseed-endpoint-routing) - [Promise and Async in the (Elmish) wild](https://www.buymeacoffee.com/florencedev/promise-async-elmish-wild) - Paweł Stadnicki - [Marskman - Matt Gallagher](https://www.compositional-it.com/news-blog/marskman/) - [Building Functional .NET Applications: a Guide for Choosing between F# vs C# (infoq.com)](https://www.infoq.com/articles/functional-dotnet-development/) **F# vNext** - [`Tracking` F# AOT, Trimmability, ILLink · Issue #13398 · dotnet/fsharp (github.com)](https://github.com/dotnet/fsharp/issues/13398) - [enable TieredPGO by default by AndyAyersMS · Pull Request #86225 · dotnet/runtime (github.com)](https://github.com/dotnet/runtime/pull/86225) > **Highlighted projects** - [matthewcrews/FastDictionaryTest: Playground for Dictionary performance improvements (github.com)](https://github.com/matthewcrews/FastDictionaryTest) **New Releases** - [ReSharper and Rider 2023.1.2 – More Bug-fixes Released | The .NET Tools Blog (jetbrains.com)](https://blog.jetbrains.com/dotnet/2023/05/17/rsrp-and-rider-2023-1-2-bug-fixes/) - [NvmFs 0.8.0](https://github.com/AngelMunoz/NvmFs/releases/tag/v0.8.0) > That’s all for now. Have a great week. If you want to help keep F# Weekly going, [click here to jazz me with Coffee](https://www.buymeacoffee.com/sergeytihon)! [![Buy Me A Coffee](https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png)](https://www.buymeacoffee.com/sergeytihon)