The .NET Core SDK cannot be located: A valid dotnet installation could not be found.

[fuszenecker]

Type: Bug

Issue Description

The .NET Core SDK cannot be located: A valid dotnet installation could not be found. .NET Core debugging will not be enabled. Make sure the .NET Core SDK is installed and is on the path.

Even though my .NET SDK is installed perfectly.

Steps to Reproduce

Open VS Code from menu.

Expected Behavior

C# extension recognises .NET SDK and runs well.

Actual Behavior

Error popup appears.

Logs

C# log

Failed to find dotnet info from path, falling back to acquire runtime via ms-dotnettools.vscode-dotnet-runtime A valid dotnet installation could not be found Dotnet path: /home/fuszenecker/.config/Code/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/7.0.10/dotnet Activating C# standalone... The .NET Core SDK cannot be located: A valid dotnet installation could not be found. .NET Core debugging will not be enabled. Make sure the .NET Core SDK is installed and is on the path. [Info - 11:19:31 AM] [Program]Language server initialized No .NET SDKs were found.

Download a .NET SDK:
https://aka.ms/dotnet/download

Learn about SDK resolution:
https://aka.ms/dotnet/sdk-not-found
[Error - 11:19:33 AM] [LanguageServerHost]System.InvalidOperationException: Failed to find an appropriate version of .NET Core MSBuild. Call to hostfxr_resolve_sdk2 failed. There may be more details in stderr.
at Microsoft.Build.Locator.DotNetSdkLocationHelper.GetDotNetBasePaths(String workingDirectory)+MoveNext()
at Microsoft.Build.Locator.DotNetSdkLocationHelper.GetInstances(String workingDirectory)+MoveNext()
at Microsoft.Build.Locator.MSBuildLocator.GetInstances(VisualStudioInstanceQueryOptions options)+MoveNext()
at System.Linq.Enumerable.WhereEnumerableIterator1.MoveNext() at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable1 source, Boolean& found)
at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source) at Microsoft.CodeAnalysis.LanguageServer.HostWorkspace.LanguageServerProjectSystem.TryEnsureMSBuildLoadedAsync(String workingDirectory) in /_/src/Features/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/HostWorkspace/LanguageServerProjectSystem.cs:line 140 at Microsoft.CodeAnalysis.LanguageServer.HostWorkspace.LanguageServerProjectSystem.OpenSolutionAsync(String solutionFilePath) in /_/src/Features/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/HostWorkspace/LanguageServerProjectSystem.cs:line 78 at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem3.StartRequestAsync(TRequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Microsoft.CommonLanguageServerProtocol.Framework/QueueItem.cs:line 136
Failed to find dotnet info from path, falling back to acquire runtime via ms-dotnettools.vscode-dotnet-runtime
A valid dotnet installation could not be found

C# LSP Trace Logs

Extension vscode.bat does not contribute csharpExtensionLoadPaths Extension vscode.clojure does not contribute csharpExtensionLoadPaths Extension vscode.coffeescript does not contribute csharpExtensionLoadPaths Extension vscode.configuration-editing does not contribute csharpExtensionLoadPaths Extension vscode.cpp does not contribute csharpExtensionLoadPaths Extension vscode.csharp does not contribute csharpExtensionLoadPaths Extension vscode.css does not contribute csharpExtensionLoadPaths Extension vscode.css-language-features does not contribute csharpExtensionLoadPaths Extension vscode.dart does not contribute csharpExtensionLoadPaths Extension vscode.debug-auto-launch does not contribute csharpExtensionLoadPaths Extension vscode.debug-server-ready does not contribute csharpExtensionLoadPaths Extension vscode.diff does not contribute csharpExtensionLoadPaths Extension vscode.docker does not contribute csharpExtensionLoadPaths Extension vscode.emmet does not contribute csharpExtensionLoadPaths Extension vscode.extension-editing does not contribute csharpExtensionLoadPaths Extension vscode.fsharp does not contribute csharpExtensionLoadPaths Extension vscode.git does not contribute csharpExtensionLoadPaths Extension vscode.git-base does not contribute csharpExtensionLoadPaths Extension vscode.github does not contribute csharpExtensionLoadPaths Extension vscode.github-authentication does not contribute csharpExtensionLoadPaths Extension vscode.go does not contribute csharpExtensionLoadPaths Extension vscode.groovy does not contribute csharpExtensionLoadPaths Extension vscode.grunt does not contribute csharpExtensionLoadPaths Extension vscode.gulp does not contribute csharpExtensionLoadPaths Extension vscode.handlebars does not contribute csharpExtensionLoadPaths Extension vscode.hlsl does not contribute csharpExtensionLoadPaths Extension vscode.html does not contribute csharpExtensionLoadPaths Extension vscode.html-language-features does not contribute csharpExtensionLoadPaths Extension vscode.ini does not contribute csharpExtensionLoadPaths Extension vscode.ipynb does not contribute csharpExtensionLoadPaths Extension vscode.jake does not contribute csharpExtensionLoadPaths Extension vscode.java does not contribute csharpExtensionLoadPaths Extension vscode.javascript does not contribute csharpExtensionLoadPaths Extension vscode.json does not contribute csharpExtensionLoadPaths Extension vscode.json-language-features does not contribute csharpExtensionLoadPaths Extension vscode.julia does not contribute csharpExtensionLoadPaths Extension vscode.latex does not contribute csharpExtensionLoadPaths Extension vscode.less does not contribute csharpExtensionLoadPaths Extension vscode.log does not contribute csharpExtensionLoadPaths Extension vscode.lua does not contribute csharpExtensionLoadPaths Extension vscode.make does not contribute csharpExtensionLoadPaths Extension vscode.markdown does not contribute csharpExtensionLoadPaths Extension vscode.markdown-language-features does not contribute csharpExtensionLoadPaths Extension vscode.markdown-math does not contribute csharpExtensionLoadPaths Extension vscode.media-preview does not contribute csharpExtensionLoadPaths Extension vscode.merge-conflict does not contribute csharpExtensionLoadPaths Extension vscode.microsoft-authentication does not contribute csharpExtensionLoadPaths Extension ms-vscode.js-debug does not contribute csharpExtensionLoadPaths Extension ms-vscode.js-debug-companion does not contribute csharpExtensionLoadPaths Extension ms-vscode.vscode-js-profile-table does not contribute csharpExtensionLoadPaths Extension vscode.builtin-notebook-renderers does not contribute csharpExtensionLoadPaths Extension vscode.npm does not contribute csharpExtensionLoadPaths Extension vscode.objective-c does not contribute csharpExtensionLoadPaths Extension vscode.perl does not contribute csharpExtensionLoadPaths Extension vscode.php does not contribute csharpExtensionLoadPaths Extension vscode.php-language-features does not contribute csharpExtensionLoadPaths Extension vscode.powershell does not contribute csharpExtensionLoadPaths Extension vscode.pug does not contribute csharpExtensionLoadPaths Extension vscode.python does not contribute csharpExtensionLoadPaths Extension vscode.r does not contribute csharpExtensionLoadPaths Extension vscode.razor does not contribute csharpExtensionLoadPaths Extension vscode.references-view does not contribute csharpExtensionLoadPaths Extension vscode.restructuredtext does not contribute csharpExtensionLoadPaths Extension vscode.ruby does not contribute csharpExtensionLoadPaths Extension vscode.rust does not contribute csharpExtensionLoadPaths Extension vscode.scss does not contribute csharpExtensionLoadPaths Extension vscode.search-result does not contribute csharpExtensionLoadPaths Extension vscode.shaderlab does not contribute csharpExtensionLoadPaths Extension vscode.shellscript does not contribute csharpExtensionLoadPaths Extension vscode.simple-browser does not contribute csharpExtensionLoadPaths Extension vscode.sql does not contribute csharpExtensionLoadPaths Extension vscode.swift does not contribute csharpExtensionLoadPaths Extension vscode.theme-abyss does not contribute csharpExtensionLoadPaths Extension vscode.theme-defaults does not contribute csharpExtensionLoadPaths Extension vscode.theme-kimbie-dark does not contribute csharpExtensionLoadPaths Extension vscode.theme-monokai does not contribute csharpExtensionLoadPaths Extension vscode.theme-monokai-dimmed does not contribute csharpExtensionLoadPaths Extension vscode.theme-quietlight does not contribute csharpExtensionLoadPaths Extension vscode.theme-red does not contribute csharpExtensionLoadPaths Extension vscode.vscode-theme-seti does not contribute csharpExtensionLoadPaths Extension vscode.theme-solarized-dark does not contribute csharpExtensionLoadPaths Extension vscode.theme-solarized-light does not contribute csharpExtensionLoadPaths Extension vscode.theme-tomorrow-night-blue does not contribute csharpExtensionLoadPaths Extension vscode.typescript does not contribute csharpExtensionLoadPaths Extension vscode.typescript-language-features does not contribute csharpExtensionLoadPaths Extension vscode.vb does not contribute csharpExtensionLoadPaths Extension vscode.xml does not contribute csharpExtensionLoadPaths Extension vscode.yaml does not contribute csharpExtensionLoadPaths Extension alexcvzz.vscode-sqlite does not contribute csharpExtensionLoadPaths Extension aliasadidev.nugetpackagemanagergui does not contribute csharpExtensionLoadPaths Extension christian-kohler.path-intellisense does not contribute csharpExtensionLoadPaths Extension ckolkman.vscode-postgres does not contribute csharpExtensionLoadPaths Extension DavidAnson.vscode-markdownlint does not contribute csharpExtensionLoadPaths Extension eamodio.gitlens does not contribute csharpExtensionLoadPaths Extension GitHub.copilot does not contribute csharpExtensionLoadPaths Extension humao.rest-client does not contribute csharpExtensionLoadPaths Extension icsharpcode.ilspy-vscode does not contribute csharpExtensionLoadPaths Extension josefpihrt-vscode.roslynator does not contribute csharpExtensionLoadPaths Extension ms-azuretools.vscode-docker does not contribute csharpExtensionLoadPaths Extension ms-dotnettools.blazorwasm-companion does not contribute csharpExtensionLoadPaths Extension ms-dotnettools.csharp does not contribute csharpExtensionLoadPaths Extension ms-dotnettools.dotnet-interactive-vscode does not contribute csharpExtensionLoadPaths Extension ms-dotnettools.vscode-dotnet-pack does not contribute csharpExtensionLoadPaths Extension ms-dotnettools.vscode-dotnet-runtime does not contribute csharpExtensionLoadPaths Extension ms-kubernetes-tools.vscode-kubernetes-tools does not contribute csharpExtensionLoadPaths Extension ms-python.python does not contribute csharpExtensionLoadPaths Extension ms-toolsai.jupyter does not contribute csharpExtensionLoadPaths Extension ms-toolsai.jupyter-keymap does not contribute csharpExtensionLoadPaths Extension ms-toolsai.jupyter-renderers does not contribute csharpExtensionLoadPaths Extension ms-toolsai.vscode-jupyter-cell-tags does not contribute csharpExtensionLoadPaths Extension ms-toolsai.vscode-jupyter-slideshow does not contribute csharpExtensionLoadPaths Extension ms-vscode-remote.remote-containers does not contribute csharpExtensionLoadPaths Extension ms-vscode-remote.remote-ssh does not contribute csharpExtensionLoadPaths Extension ms-vscode-remote.remote-ssh-edit does not contribute csharpExtensionLoadPaths Extension ms-vscode-remote.vscode-remote-extensionpack does not contribute csharpExtensionLoadPaths Extension ms-vscode.makefile-tools does not contribute csharpExtensionLoadPaths Extension ms-vscode.powershell does not contribute csharpExtensionLoadPaths Extension ms-vscode.remote-explorer does not contribute csharpExtensionLoadPaths Extension ms-vscode.remote-server does not contribute csharpExtensionLoadPaths Extension Okteto.remote-kubernetes does not contribute csharpExtensionLoadPaths Extension quicktype.quicktype does not contribute csharpExtensionLoadPaths Extension redhat.vscode-yaml does not contribute csharpExtensionLoadPaths Extension rogalmic.vscode-xml-complete does not contribute csharpExtensionLoadPaths Extension vscode-icons-team.vscode-icons does not contribute csharpExtensionLoadPaths Extension yzane.markdown-pdf does not contribute csharpExtensionLoadPaths Extension yzhang.markdown-all-in-one does not contribute csharpExtensionLoadPaths Extension zxh404.vscode-proto3 does not contribute csharpExtensionLoadPaths

Environment information

VSCode version: 1.81.1
C# Extension: 2.0.376
Using OmniSharp: false

Dotnet Information

Host:
Version: 7.0.10
Architecture: x64
Commit: a6dbb800a4

.NET SDKs installed:
No SDKs were found.

.NET runtimes installed:
Microsoft.NETCore.App 7.0.10 [/home/fuszenecker/.config/Code/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/7.0.10/shared/Microsoft.NETCore.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Visual Studio Code Extensions

Extension	Author	Version	Folder Name
blazorwasm-companion	ms-dotnettools	1.1.4	ms-dotnettools.blazorwasm-companion-1.1.4
copilot	GitHub	1.104.341	github.copilot-1.104.341
csharp	ms-dotnettools	2.0.376	ms-dotnettools.csharp-2.0.376-linux-x64
dotnet-interactive-vscode	ms-dotnettools	1.0.4403010	ms-dotnettools.dotnet-interactive-vscode-1.0.4403010
gitlens	eamodio	14.2.1	eamodio.gitlens-14.2.1
ilspy-vscode	icsharpcode	0.16.1	icsharpcode.ilspy-vscode-0.16.1
jupyter	ms-toolsai	2023.7.1002162226	ms-toolsai.jupyter-2023.7.1002162226-linux-x64
jupyter-keymap	ms-toolsai	1.1.2	ms-toolsai.jupyter-keymap-1.1.2
jupyter-renderers	ms-toolsai	1.0.17	ms-toolsai.jupyter-renderers-1.0.17
makefile-tools	ms-vscode	0.7.0	ms-vscode.makefile-tools-0.7.0
markdown-all-in-one	yzhang	3.5.1	yzhang.markdown-all-in-one-3.5.1
markdown-pdf	yzane	1.4.4	yzane.markdown-pdf-1.4.4
nugetpackagemanagergui	aliasadidev	2.0.6	aliasadidev.nugetpackagemanagergui-2.0.6
path-intellisense	christian-kohler	2.8.4	christian-kohler.path-intellisense-2.8.4
powershell	ms-vscode	2023.6.0	ms-vscode.powershell-2023.6.0
python	ms-python	2023.14.0	ms-python.python-2023.14.0
quicktype	quicktype	12.0.46	quicktype.quicktype-12.0.46
remote-containers	ms-vscode-remote	0.304.0	ms-vscode-remote.remote-containers-0.304.0
remote-explorer	ms-vscode	0.4.1	ms-vscode.remote-explorer-0.4.1
remote-kubernetes	Okteto	0.4.10	okteto.remote-kubernetes-0.4.10
remote-server	ms-vscode	1.4.0	ms-vscode.remote-server-1.4.0
remote-ssh	ms-vscode-remote	0.102.0	ms-vscode-remote.remote-ssh-0.102.0
remote-ssh-edit	ms-vscode-remote	0.86.0	ms-vscode-remote.remote-ssh-edit-0.86.0
rest-client	humao	0.25.1	humao.rest-client-0.25.1
roslynator	josefpihrt-vscode	4.4.0	josefpihrt-vscode.roslynator-4.4.0
vscode-docker	ms-azuretools	1.26.0	ms-azuretools.vscode-docker-1.26.0
vscode-dotnet-pack	ms-dotnettools	1.0.12	ms-dotnettools.vscode-dotnet-pack-1.0.12
vscode-dotnet-runtime	ms-dotnettools	1.7.0	ms-dotnettools.vscode-dotnet-runtime-1.7.0
vscode-icons	vscode-icons-team	12.5.0	vscode-icons-team.vscode-icons-12.5.0
vscode-jupyter-cell-tags	ms-toolsai	0.1.8	ms-toolsai.vscode-jupyter-cell-tags-0.1.8
vscode-jupyter-slideshow	ms-toolsai	0.1.5	ms-toolsai.vscode-jupyter-slideshow-0.1.5
vscode-kubernetes-tools	ms-kubernetes-tools	1.3.13	ms-kubernetes-tools.vscode-kubernetes-tools-1.3.13
vscode-markdownlint	DavidAnson	0.51.0	davidanson.vscode-markdownlint-0.51.0
vscode-postgres	ckolkman	1.4.3	ckolkman.vscode-postgres-1.4.3
vscode-proto3	zxh404	0.5.5	zxh404.vscode-proto3-0.5.5
vscode-remote-extensionpack	ms-vscode-remote	0.24.0	ms-vscode-remote.vscode-remote-extensionpack-0.24.0
vscode-sqlite	alexcvzz	0.14.1	alexcvzz.vscode-sqlite-0.14.1
vscode-xml-complete	rogalmic	0.3.0	rogalmic.vscode-xml-complete-0.3.0
vscode-yaml	redhat	1.14.0	redhat.vscode-yaml-1.14.0

Extension version: 2.0.376
VS Code version: Code 1.81.1 (6c3e3dba23e8fadc360aed75ce363ba185c49794, 2023-08-09T22:18:39.991Z)
OS version: Linux x64 6.4.10-arch1-1
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) i3-5005U CPU @ 2.00GHz (4 x 1895)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off
Load (avg)	3, 3, 2
Memory (System)	3.74GB (0.92GB free)
Process Argv	--unity-launch --crash-reporter-id 29d118ce-ff35-495d-949f-64a4eccdfcf9
Screen Reader	no
VM	0%
DESKTOP_SESSION	plasmawayland
XDG_CURRENT_DESKTOP	KDE
XDG_SESSION_DESKTOP	KDE
XDG_SESSION_TYPE	wayland

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pythonvs932:30410667
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pythonnosmt12:30797651
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pythonnoceb:30805159
dsvsc013:30795093
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diffeditorv1:30812748

[dibarbet]

@fuszenecker

Thanks for the report. I'm having trouble reproing this on my linux machine, so I could use some additional info. I have a couple guesses, but not 100% sure.

1. Do you have the omnisharp.dotNetCliPaths option set?
2. Would you also be able to run dotnet --info and paste the output?
3. I have a potential related fix in Do not cache calls to dotnet info #6180 . Would you be able to try it out and let me know? You can find the linux x64 vsix here https://artprodcus3.artifacts.visualstudio.com/A6fcc92e5-73a7-4f88-8d13-d9045b45fb27/cbb18261-c48f-4abb-8651-8cdcb5474649/_apis/artifact/cGlwZWxpbmVhcnRpZmFjdDovL2RuY2VuZy1wdWJsaWMvcHJvamVjdElkL2NiYjE4MjYxLWM0OGYtNGFiYi04NjUxLThjZGNiNTQ3NDY0OS9idWlsZElkLzM3OTk3Ny9hcnRpZmFjdE5hbWUvVlNJWHMrLStBdHRlbXB0KzE1/content?format=file&subPath=%2Fcsharp-linux-x64-2.0.401-g768b7c92dc.vsix

[dibarbet]

Going to close this issue. We've made a number of changes around dotnet resolution that may have helped with this problem. If you're still encountering issues with find the SDK, please file a new issue with C# output window logs from the latest extension version.