G# –> a new dotnet language like Go/Swift/Kotlin with C# interop
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I started working on this back in 2019, mostly as a design idea. Over the last month I made a big push to make it 100% usable and replace C# in all my personal projects. I now feel it's solid enough to gather feedback from other developers. If you take it for a spin, I hope you enjoy it and send your thoughts!
HN · launched Jun 15, 2026 · 9 upvotes (top 45%) · 1 view
Niche: programming languages and interpreters · 161 launches, 2 in the last 7 days ▼ -75% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 161 launches in programming languages and interpreters →
Could you build this?
No Developing a full-fledged programming language compiler targeting .NET assemblies with custom syntax, language server, MSBuild integration, and debuggers requires immense language engineering expertise.
What it would actually take: The project consists of a compiler generating Common Intermediate Language (CIL) assemblies via Roslyn or System.Reflection.Metadata, implementing complex features like structured concurrency, null-safety, and pattern matching. It also requires an MSBuild SDK, a Language Server Protocol (LSP) daemon, and Portable PDB emission for debugging, demanding deep compiler construction and CLR internals expertise.
Discussion
2 comments analyzed.
Concerns raised: F# functions lack default arguments support, limiting functional programming paradigm
Feature requests: Add default arguments support to normal functions (not just methods)
Competitors
Other products that read as similar to this one : 84 launches clear the similarity bar, closest 8 shown.
Attention rank: #40 of 85 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 222 days after the earliest competitor.
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- Valk · hn · 2026-02-10 · 5 upvotes · similarity 0.44
- My biggest solo-project: Game engine with its own programming language · hn · 2026-05-25 · 5 upvotes · similarity 0.43
- The Taka Programming Language · hn · 2025-12-03 · 12 upvotes · similarity 0.42
- SharpTS · hn · 2026-01-09 · 6 upvotes · similarity 0.41
- kotlin-compiler-go · github · 2026-10-31 · 21 upvotes · similarity 0.41
- A working reference implementation of context engineering · hn · 2026-04-17 · 46 upvotes · similarity 0.40
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