[BUG] Intellisense Issues with MAUI apps.

[BenBtg]

Describe the Issue

I have frequently hit an issue in VSCode where intellisense does nothing when working on a MAUI app.
I have struggled to find consistent repro steps but I believe it is common enough to raise and share what I have found so far in logs.
When intellisense fails I notice the following popup error

Logs show the following output which seems relavant

2024-11-19 16:41:01.519 [info] Activating C# + C# Dev Kit + C# IntelliCode...
2024-11-19 16:41:32.436 [info] [Error - 16:41:31] Microsoft.CodeAnalysis.LanguageServer client: couldn't create connection to server.
2024-11-19 16:41:32.436 [info] Error: Timeout. Client cound not connect to server via named pipe
    at Function.<anonymous> (/Users/benbtg/.vscode/extensions/ms-dotnettools.csharp-2.56.31-darwin-arm64/dist/extension.js:2:1178883)
    at Generator.next (<anonymous>)
    at s (/Users/benbtg/.vscode/extensions/ms-dotnettools.csharp-2.56.31-darwin-arm64/dist/extension.js:2:1164923)
2024-11-19 16:41:46.851 [info] [stdout] {"pipeName":"/var/folders/sp/bd4zhlgj67v5g_strq8jtl8c0000gn/T/9b0ff660.sock"}

2024-11-19 16:41:46.851 [info] received named pipe information from server
2024-11-19 16:41:46.868 [info] client has connected to server

Steps To Reproduce

I couldn't repro from a new template app. I would get expected itellisense drop downs as I was coding.

However open any existing nontrivial MAUI app
e.g. the sample app in this repo https://github.com/jfversluis/Plugin.Maui.Audio.git
and I would get the above issue.
Any code changes in C# would not produce expected Intellisense autocomplete suggestions list of available members in the current context.

Note I would however get the CoPilot suggestions.

Also I noticed "Projects" status was continually progress no matter how long I waited.

.

Expected Behavior

No response

Environment Information

MacOS 15.1

VSCode
Version: 1.95.3 (Universal)
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: Darwin arm64 24.1.0

Extensions:

Name: C#
Id: ms-dotnettools.csharp
Description: Base language support for C#
Version: 2.57.28

Name: .NET MAUI
Id: ms-dotnettools.dotnet-maui
Description: Extend C# Dev Kit with tools for building .NET Multi-platform App UI (MAUI) apps
Version: 1.4.36

[emaf]

cc @mgoertz-msft

[mgoertz-msft]

That's the C# Language Server. FYI @dibarbet

[dibarbet]

It looks like the client is timing out connecting to the server after 30 seconds, but 15 seconds later the connection comes in (note the timestamps below).

2024-11-19 16:41:01.519 [info] Activating C# + C# Dev Kit + C# IntelliCode...
2024-11-19 16:41:32.436 [info] [Error - 16:41:31] Microsoft.CodeAnalysis.LanguageServer client: couldn't create connection to server.
2024-11-19 16:41:32.436 [info] Error: Timeout. Client cound not connect to server via named pipe
    at Function.<anonymous> (/Users/benbtg/.vscode/extensions/ms-dotnettools.csharp-2.56.31-darwin-arm64/dist/extension.js:2:1178883)
    at Generator.next (<anonymous>)
    at s (/Users/benbtg/.vscode/extensions/ms-dotnettools.csharp-2.56.31-darwin-arm64/dist/extension.js:2:1164923)
2024-11-19 16:41:46.851 [info] [stdout] {"pipeName":"/var/folders/sp/bd4zhlgj67v5g_strq8jtl8c0000gn/T/9b0ff660.sock"}

We increased the timeout in 2.57.28 to 2 minutes - dotnet/vscode-csharp#7788
@BenBtg would you try upgrading to 2.57.28? The logs indicate you're on 2.56.31