C#•2w ago

How to fix VSCode Error/Warning for valid code

Is there something I need to do in vscode to use a newer lang version or something so that it doesn't think this is an error

interface IInterface
{
    void Test(Action<ReadOnlySpan<byte>> callback);
}

interface IInterface
{
    void Test(Action<ReadOnlySpan<byte>> callback);
}

The type 'ReadOnlySpan<byte>' may not be used as a type argument

The type 'ReadOnlySpan<byte>' may not be used as a type argument

The code compiles but vscode syntax highlighting shows it as an error

19 Replies

Sehra•2w ago

maybe that you forgot interface?

jboreanOP•2w ago

Sorry that was just me copy/pasting wrong, it’s definitely there It’s complaining thinking ROS can’t be used in the Func but it can be since the latest C# version

Sehra•2w ago

should be fine since net9, see which target framework you are building for, and which sdk you are using

jboreanOP•2w ago

the csproj has net9.0 To be clear it has

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net9.0</TargetFramework>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
    <Nullable>enable</Nullable>
    <PublishTrimmed>true</PublishTrimmed>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="System.IO.Pipelines" Version="9.0.0" />
  </ItemGroup>

</Project>

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net9.0</TargetFramework>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
    <Nullable>enable</Nullable>
    <PublishTrimmed>true</PublishTrimmed>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="System.IO.Pipelines" Version="9.0.0" />
  </ItemGroup>

</Project>

Sehra•2w ago

looks fine, maybe something in vscode, check if the c# dev kit is updated

Angius•2w ago

Try explicitly setting the language version?

jboreanOP•2w ago

I'm not using the dev kit, just the plain C# extension

Angius•2w ago

That could be the issue lol

jboreanOP•2w ago

But it is up to date As in newer features only come to the dev kit one or just it gets more attention support wise from MS?

Angius•2w ago

Both

jboreanOP•2w ago

Ok, will look at submitting an issue on the extension then Unfortunately an explicit LangVersion didn't help Looks like it is ok in the dev kit so yes sounds like a bug they need to fix in the standard analyser

Angius•2w ago

I'm not sure they will, DevKit is the way to add .NET support to VSCode

Sehra•2w ago

but also with an annoying sign in requirement

Angius•2w ago

Well, yeah, it uses the same licensing model as VS proper Me, personally, $ridergang

MODiX•2w ago

:rider: 🇬 🇦 🇳 🇬

Core•2w ago

https://tenor.com/view/rider-my-beloved-ide-csharp-gif-26864052

Tenor

jboreanOP•2w ago

DevKit is marked as optional and while I agree it has new features it is documented that the plain C# extension should work just fine for normal analysis without any VS subscription I would also love to use Rider but VSCode's remote ssh extension is miles ahead (it actually works on my host) than Rider's equivalent

jboreanOP•2w ago

Opened https://github.com/dotnet/vscode-csharp/issues/7911, worst that can happen is they say no

GitHub

Issues · dotnet/vscode-csharp

Official C# support for Visual Studio Code. Contribute to dotnet/vscode-csharp development by creating an account on GitHub.

jboreanOP•2w ago

Welp it turns out I had "dotnet.server.useOmnisharp": true set in my VSCode SSH remote settings but not local so I thought I wasn't using O# but it in fact was. Removed that and things start working magically

Gaming

Programming

How to fix VSCode Error/Warning for valid code

Did you find this page helpful?