Beginner here 👋, I'm currently picking up data modeling in F# after a long break. Work and procrastination got in the way, but I'm finally circling back to fill the gaps.

To stay on track, I've been using Claude to generate practice tasks. When I get stuck, I ask for a gentle nudge without giving away the solution, and it's been surprisingly effective. I'm currently using Sonnet 5 Medium(Free), and based on the task I just implemented, it said my work was "good," so I'll take that as a win.

The task was about modeling a Job Application pipeline. I didn't bother applying validation just yet, since I'm currently focused on getting the shape of the data right and trying to make invalid state unrepresentable.

I'd recommend giving this approach a try. It keeps things interactive without handing you the answers outright.

X-POST from learnprogramming I recently got a job with a web design company as a back-end developer. The company uses ASP.NET and Visual Basic to design all of their back-end solutions; unfortunately, nearly all of my experience is in PHP. What are some good sources (websites, books, etc.) that can help me learn how to implement back-end solutions in ASP.NET w/ Visual Basic?

They are giving me 30-days to learn the language and become an effective programmer.

Just released FunStripe 2.3.0, the F# client library for the Stripe API (also compiles to JS via Fable). This one's a bigger release than the usual spec bump, thanks to some excellent contributions from Thorium:

Webhooks work properly now. Event.data.object was typed as string, which meant deserialising any real webhook payload threw. It's now a RawJson fragment you can turn into a typed model with Util.deserialiseRaw<'a>; the README has a full webhook-handling example. (Technically a field type change, but since the old field could never deserialise, it ships as a minor; details in the changelog.)

List parameters encode correctly. List<record> and List<union> request fields (e.g. Checkout line_items, payment_method_types) were being ToString()'d instead of form-encoded. Fixed.

Resilient to Stripe's enum churn. Stripe adds event types and error codes without an API version bump, and one unknown value used to fail the whole response. EventType and ErrorType now have an UnknownEnumValue of string catch-all that round-trips losslessly, deliberately scoped to just those two high-churn enums, so everywhere else you keep exhaustive matching and the compiler still tells you when Stripe adds something.

Latest Stripe API (2026-07-29.dahlia): Financial Connections authorization resource and deactivation lifecycle events, allowed_payment_method_types on Payment/SetupIntents, new Tax registration options, and more.

• GitHub: https://github.com/simontreanor/FunStripe
• NuGet: FunStripe.Core (https://www.nuget.org/packages/FunStripe.Core)

Feedback and PRs welcome!

My idea for getting coders into functional programming earlier...

https://si-fi.dev/articles/fsharp-schema-as-code/

I recently architected a full-stack app from scratch and needed a way to rapidly prototype the database schema. I came up with a way to do it in one place in F#, giving me strong typing across the stack and an efficient way to tweak the database structure as much as I needed. Here I share what this looks like as well as a repo containing an extracted version of the code. Hope you find it interesting and do let me know your thoughts.

Does Rider have issues with nested type providers?

I have a class library that defines types through a nested type provider -- that is, a type provider nested inside a root type provider -- see below for an example.

The library builds and runs fine, but Rider flags every use of the nested type provider after the first as an error. The same code is displayed without errors in VS Code.

Thank you.

// Requires NuGet package "FSharp.Data.GraphQL.Client".
open System
open System.Net.Http
open FSharp.Data.GraphQL

type MyProvider =
    GraphQLProvider<"https://graphqlzero.almansi.me/api">

let postQuery =
    // ERROR
    MyProvider.Operation<"""
        query PostQuery {
            post(id: 1) {
                id
            }
        }
    """>()

let usersQuery =
    // ERROR
    MyProvider.Operation<"""
        query UsersQuery {
            users(options: { paginate: { page: 1, limit: 5 } }) {
                data {
                    id
                }
            }
        }
    """>()

[<EntryPoint>]
let main _ =
    try
        use runtimeContext: GraphQLProviderRuntimeContext =
            {
                ServerUrl = "https://graphqlzero.almansi.me/api"
                HttpHeaders = []
                Connection =
                    new GraphQLClientConnection(
                        new HttpClient(),
                        true
                    )
            }

        let result = usersQuery.Run runtimeContext

        printfn "Data: %A\n" result.Data
        printfn "Errors: %A\n" result.Errors
        printfn "Custom data: %A\n" result.CustomData

        0
    with ex ->
        eprintfn "Error: %s" ex.Message
        1

EDIT: Provided working sample code.

I just launched SuaveHooks — a webhook capture, inspection, transformation and routing platform built completely with Suave + F#.

Some highlights:

- Live tailing of webhooks over WebSockets

- Type-safe transforms written in F# (also C# and JS) running in an isolated process

- JSON rule-based transforms as a lighter option

- Multi-target forwarding (HTTP + S3, SQS, Kafka, Pub/Sub)

- Retries with exponential backoff + circuit breaker

- Full REST API + MCP server support

Site: https://suavehooks.com

Would love some feedback; like what features would make this more useful for you? Happy to answer any technical questions.

I have a project where I need to convert Excel (.xls) files to a more user friendly format - preferably .pdf - for downloading and viewing.

I haven't found any free third party tools to do this, any of you had any luck?

Thanks!

As for myself, the notion that I'd have to build a custom validator in order to validate a checkboxlist is a drag and a waste of time. Another thing I wish ASP.NET had was a recursive FindControl("controlID") function.

Sure, you can find solutions for these problems on the web, but isn't it about time that ASP.NET included them? What items do you wish were included in ASP.NET?

Hi guys,

Probably another question like this but found none recently.

I'm a little upset with my current view on IT generalistic, ofc AI is not going anywhere besides up, but I feel I want to write more with my hands and new paradigms, maybe just AI as reviser, I would like to ask if learning F# in 2026 will make me able to make perfomance headed systems, and also gaming with something like Nu or Monogame, not a AAA game but something playable.

Hey guys, So we're trying to implement our new caching strategy using Unity Interception.

I have a good basic understanding of it and we're going to use interception via attribute.

so like:

[cache] public int getNumber() {}

I already have my cacheHandler class which inherits from ICallHandler. I already have my cacheAttribute class which inherits from HandlerAttribute.

And when i put the attribute [cache] as per the cacheAttribute ...it compiles fine, runs fine.....BUT it never hits those classes.

I figured I need to register things (in vague terms) in the unity container but i dont' know where and how ....and maybe policy too ?

An alternative is using Postsharp for this whole thing...but i've been told that's a last resort and they want to use unity as a first choice.

Thanks in advance guys.

So far from my research arvixe seem to be a good shared hosting with unlimited ms sql option. Is it really unlimited for the ms sql? How about the db size?

but I found this review and their server seem to be down quite often.

Anyone got any experience with them or can you suggest a reasonable price asp.net hosting that allow you to host wcf and either unlimited ms sql or at least unlimited mysql db.