csharplang

The official repo for the design of the C# programming language (by dotnet)

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csharplang reviews and mentions

Posts with mentions or reviews of csharplang. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2025-05-20.
  • "ZLinq", a Zero-Allocation LINQ Library for .NET
    5 projects | news.ycombinator.com | 20 May 2025
    Sadly expression trees got out of love in modern .NET and it remains to be seen how much they will ever improve them.

    https://github.com/dotnet/csharplang/discussions/158

  • Why Tracebit is written in C#
    6 projects | news.ycombinator.com | 31 Jan 2025
    Here's the language proposal for those that are interested.

    https://github.com/dotnet/csharplang/issues/8928

  • The Untouched Goldmine of F#
    1 project | news.ycombinator.com | 16 Jan 2025
    C# has a much awaited and active proposal to add DUs to C# so I suspect C# will also support this once live (and continue its legacy of plucking great features from F#).

    https://github.com/dotnet/csharplang/blob/main/proposals/Typ...

  • The Monad Invasion - Part 3: Railway-Oriented Programming
    2 projects | dev.to | 15 Nov 2024
    We cannot blame Monads or ROP for this issue - it is a language limitation. In comparison, this is where a language like F# shines, as it allows us to define a discriminated union type that can carry multiple types of failures. Still, hope is possible - discriminated unions will eventually come to C#.
  • Sets, Types and Type Checking
    2 projects | news.ycombinator.com | 31 Oct 2024
    disjoint union vs union.

    Scala3 is the only programming language to implement both AFAIK.

    C# has a proposal to add both unions and disjoint unions: https://github.com/dotnet/csharplang/blob/main/proposals/Typ...

    OCaml has polymorphic variants which are open disjoint unions.

    Kotlin is looking to add union types for errors: https://youtrack.jetbrains.com/issue/KT-68296/Union-Types-fo...

    I believe Java's checked exceptions behave somewhat like union types.

  • A comparison of Rust's borrow checker to the one in C#
    14 projects | news.ycombinator.com | 30 Oct 2024
    There is a runtime (not C#) feature that has been added that is relevant to the article: ref fields in structs. Before these, only certain runtime-blessed types like Span could contain refs directly.

    In case anyone is interested, here is the spec about refs in structs and other lifetime features mentioned in the article:

    https://github.com/dotnet/csharplang/blob/main/proposals/csh...

    And here is the big list of ways .NET differs from the publish ECMA spec. Some of these differences represent new runtime features.

    https://github.com/dotnet/runtime/blob/main/docs/design/spec...

  • Net 9.0 LINQ Performance Improvements
    16 projects | news.ycombinator.com | 18 Oct 2024
    7 years ago: https://github.com/dotnet/csharplang/issues/1060

    3 years ago: https://github.com/dotnet/csharplang/blob/main/meetings/2021...

    I've given up submitting to csharplang now. It seemed like a positive when it was first open-sourced, but the proposals/issues are often just circular discussions that go nowhere. It doesn't feel (at least from the outside) that any proposal by a non-MS employee would make it thru the process unless MS needed it themselves. Which is what I was alluding to in my original post.

    I may well be wrong and maybe some proposals have made it through, but it feels like an illusion of community collaboration rather than actual community collaboration imho.

  • Why is F# code so robust and reliable?
    3 projects | news.ycombinator.com | 24 Sep 2024
    https://github.com/dotnet/csharplang/blob/main/proposals/Typ...
  • Discriminated unions in 2024
    4 projects | dev.to | 18 Sep 2024
    This means we rely on switch expressions rather than a Match function with lambdas for each case. Unfortunately, unlike lambdas, switch expressions don't allow blocks of code. However, we can emulate them like this:
  • .NET Digest #3
    2 projects | dev.to | 4 Sep 2024
    Type Unions for C#
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