C# Extension: "Microsoft.CodeAnalysis.LanguageServer client: couldn't create connection to server" Error

[Aaron-Wilhite]

I am getting an error message: "Microsoft.CodeAnalysis.LanguageServer client: couldn't create connection to server." Source: C#.

Environment data

dotnet --info output:
VS Code version:
Version: 1.95.3 (user setup)
Commit: f1a4fb101478ce6ec82fe9627c43efbf9e98c813
Date: 2024-11-13T14:50:04.152Z
Electron: 32.2.1
ElectronBuildId: 10427718
Chromium: 128.0.6613.186
Node.js: 20.18.0
V8: 12.8.374.38-electron.0
OS: Windows_NT x64 10.0.19045

C# Extension version: v2.55.29

Steps to reproduce

Upon opening VSCode I get the following:

Additional context

It seems to be an administrator privilege issue, since this doesn't happen when I open VSCode as an admin.

I have tried:

1. Uninstalling and reinstalling all related C#/.NET extensions and previous versions.
2. Deleting them from the folder structure and reinstalling them.
3. Uninstalling and reinstalling all corresponding .NET SDKs/Runtimes
4. Uninstalling and reinstalling VSCode.

[AnthonyElcocks]

This may not be relevant to your situation but I was also receiving this message when starting VS Code using a workspace file, and it was because I had the project folder named as `Learn C#'. Renaming it to Learn C Sharp resolved the issue.

[dibarbet]

@Aaron-Wilhite Apologies for the delay here. Not sure what is causing this exactly, but generally the client permissions need to match the server permissions. I'm guessing that there might be a mismatch here as the client fails to connect to the named pipe created by the server.

If you could check the user associated with the server process (Microsoft.CodeAnalysis.LanguageServer.exe)
)

and compare it with the code process to make sure they're the same?

However that might not be particularly helpful, as there could be a different .NET crash happening. It would also be helpful if you collected the C# trace logs as described here and attach them
https://github.com/dotnet/vscode-csharp/blob/main/SUPPORT.md#collecting-general-logs

[dibarbet]

closing, not enough info