Bug report

[mazdeoli]

Type: Bug

Issue Description

Steps to Reproduce

Expected Behavior

Actual Behavior

Extension version: 2.130.5
VS Code version: Code 1.113.0 (cfbea10c5ffb233ea9177d34726e6056e89913dc, 2026-03-24T15:07:18+01:00)
OS version: Windows_NT x64 10.0.22631
Modes:

Logs

C# log

Details

2026-03-30 14:22:58.762 [info] Locating .NET runtime version 10.0.5
2026-03-30 14:22:58.867 [info] Dotnet path: C:\Program Files\dotnet\dotnet.exe
2026-03-30 14:22:58.868 [info] Activating C# + C# Dev Kit...
2026-03-30 14:22:59.630 [info] info: Program[0]
2026-03-30 14:22:59.630 [info]       Server started with process ID 38676
2026-03-30 14:23:01.830 [info] [Program] Language server initialized
2026-03-30 14:23:01.830 [info] [Program] Monitoring client process 29640 for exit
2026-03-30 14:23:05.022 [info] [textDocument/diagnostic] [Microsoft.CodeAnalysis.MSBuild.BuildHostProcessManager] .NET BuildHost started from c:\Users\mazdeoli\.vscode\extensions\ms-dotnettools.csharp-2.130.5-win32-x64\.roslyn\Microsoft.CodeAnalysis.LanguageServer.exe reloading to start from C:\Program Files\dotnet\dotnet.exe to match necessary SDK location.
2026-03-30 14:23:14.045 [warning] [textDocument/diagnostic] [LanguageServerProjectLoader] Project C:\Users\mazdeoli\AppData\Local\Temp\roslyn-canonical-misc\1a47664b-eaea-428f-aa5c-6a2e00ad292c\Canonical.csproj has unresolved dependencies
2026-03-30 14:23:14.073 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Successfully completed load of C:\Users\mazdeoli\AppData\Local\Temp\roslyn-canonical-misc\1a47664b-eaea-428f-aa5c-6a2e00ad292c\Canonical.cs
2026-03-30 14:23:14.074 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Restoring Canonical.cs: Running dotnet restore on C:\Users\mazdeoli\AppData\Local\Temp\roslyn-canonical-misc\1a47664b-eaea-428f-aa5c-6a2e00ad292c\Canonical.cs
2026-03-30 14:23:14.075 [info] [textDocument/diagnostic] [Microsoft.CodeAnalysis.LanguageServer.DotnetCliHelper] Using dotnet executable configured on the PATH
2026-03-30 14:23:14.100 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Restoring Canonical.cs:   Determining projects to restore...
2026-03-30 14:23:17.648 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Restoring Canonical.cs:   Restored C:\Users\mazdeoli\AppData\Local\Temp\roslyn-canonical-misc\1a47664b-eaea-428f-aa5c-6a2e00ad292c\Canonical.csproj (in 658 ms).
2026-03-30 14:23:17.753 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Restore complete
2026-03-30 14:23:17.811 [info] [textDocument/diagnostic] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:11.0419625
2026-03-30 14:23:22.050 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\mazdeoli\source\VSCode-repos\Courseload\Courseload.DAL\Courseload.DAL.csproj loaded by C# Dev Kit
2026-03-30 14:23:22.090 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\mazdeoli\source\VSCode-repos\Courseload\Courseload.Test\Courseload.Test.csproj loaded by C# Dev Kit
2026-03-30 14:23:22.090 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\mazdeoli\source\VSCode-repos\Courseload\Courseload.Web\Courseload.Web.csproj loaded by C# Dev Kit
2026-03-30 14:23:22.091 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\mazdeoli\source\VSCode-repos\Courseload\Courseload.BLL\Courseload.BLL.csproj loaded by C# Dev Kit
2026-03-30 14:23:22.115 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\mazdeoli\source\VSCode-repos\Courseload\Courseload.Model\Courseload.Model.csproj loaded by C# Dev Kit
2026-03-30 14:23:22.117 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\mazdeoli\source\VSCode-repos\Courseload\Courseload.Util\Courseload.Util.csproj loaded by C# Dev Kit
2026-03-30 16:09:40.888 [error] Request textDocument/inlayHint failed.
  Message: Project does not contain any Razor documents. (Parameter 'project')
  Code: -32000 
[object Object]
2026-03-30 16:09:40.977 [error] Request textDocument/semanticTokens/range failed.
  Message: Project does not contain any Razor documents. (Parameter 'project')
  Code: -32000 
[object Object]
2026-03-30 16:09:41.057 [error] Request textDocument/documentSymbol failed.
  Message: Project does not contain any Razor documents. (Parameter 'project')
  Code: -32000 
[object Object]
2026-03-30 16:09:43.147 [error] Request textDocument/semanticTokens/range failed.
  Message: Project does not contain any Razor documents. (Parameter 'project')
  Code: -32000 
[object Object]
2026-03-30 16:09:43.219 [error] Request textDocument/inlayHint failed.
  Message: Project does not contain any Razor documents. (Parameter 'project')
  Code: -32000 
[object Object]
2026-03-30 16:09:44.746 [error] Request textDocument/semanticTokens/range failed.
  Message: Project does not contain any Razor documents. (Parameter 'project')
  Code: -32000 
[object Object]

C# LSP Trace Logs log

Details

Environment Information

VSCode version: 1.113.0
C# Extension: 2.130.5
Using OmniSharp: false

Dotnet Information

.NET SDK: Version: 10.0.201 Commit: 4d3023de60 Workload version: 10.0.200-manifests.121cc9e6 MSBuild version: 18.3.0-release-26153-122+4d3023de6

Runtime Environment:
OS Name: Windows
OS Version: 10.0.22631
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\10.0.201\

.NET workloads installed:
There are no installed workloads to display.
Configured to use workload sets when installing new manifests.
No workload sets are installed. Run "dotnet workload restore" to install a workload set.

Host:
Version: 10.0.5
Architecture: x64
Commit: a612c2a105

.NET SDKs installed:
3.1.426 [C:\Program Files\dotnet\sdk]
6.0.317 [C:\Program Files\dotnet\sdk]
9.0.312 [C:\Program Files\dotnet\sdk]
10.0.201 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 3.1.29 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.25 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.14 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.29 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.25 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.14 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.29 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.22 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.25 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.14 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
DOTNET_CLI_UI_LANGUAGE [en-US]

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
adobe-cfml-lsp	com-adobe-coldfusion	1.0.701	com-adobe-coldfusion.adobe-cfml-lsp-1.0.701
claude-dev	saoudrizwan	3.76.0	saoudrizwan.claude-dev-3.76.0
copilot-chat	GitHub	0.41.2	github.copilot-chat-0.41.2
csdevkit	ms-dotnettools	3.10.4	ms-dotnettools.csdevkit-3.10.4-win32-x64
csharp	ms-dotnettools	2.130.5	ms-dotnettools.csharp-2.130.5-win32-x64
powershell	ms-vscode	2025.4.0	ms-vscode.powershell-2025.4.0
vscode-dotnet-runtime	ms-dotnettools	3.0.0	ms-dotnettools.vscode-dotnet-runtime-3.0.0

C# Settings

Setting	Value
preferCSharpExtension	false
compilerDiagnosticScope	openFiles
analyzerDiagnosticScope	openFiles
enableXamlTools	true
useServerGC	true

System Info

Item	Value
CPUs	11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz (8 x 1382)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x8086, DEVICE=0x9a49 [Intel(R) Iris(R) Xe Graphics], DRIVER_VENDOR=Intel, DRIVER_VERSION=30.0.100.9955 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.22621.5415 Machine model name: Machine model version: 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 skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	31.74GB (6.58GB free)
Process Argv	--folder-uri file:///c%3A/Users/mazdeoli/source/VSCode-repos/Courseload --crash-reporter-id bb600d3e-5d10-40f6-83f2-45d16dc42336
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
6abeh943:31336334
envsdeactivate2:31464701
cloudbuttont:31379625
3efgi100_wstrepl:31403338
bj468946:31457056
use-responses-api:31390855
anonusage:31403420
je187915:31401257
ec5jj548:31422691
cp_cls_t_966_ss:31454198
4je02754:31466945
find_all_ref_in_bg_f:31469307
c3h7c220:31478652
ge8j1254_inline_auto_hint_haiku:31431912
38bie571_auto:31478677
cp_cls_t_1081:31454832
ia-use-proxy-models-svc:31452481
e9c30283:31461165
test_control1:31471004
control_6dc23131:31467998
idci7584:31464702
nes-ftch-new:31485413
showingstats:31481873
534a6447_copy:31478748
hg17d649:31458077
nes-extended-on:31455476
chat:31457767
8hig5102:31480529
ah:31461780
67jbj424:31484169
bg_compact_c:31481651
t-some:31484756
cpptoolson-v2:31475363
db0gd219:31481871
c5d46265_tst_off:31484208
po_com_t:31483952
ddid_t:31478206
jah3f675:31485061

[davidwengier]

@mazdeoli could you share the details of your project? If you use a new project (ie, dotnet new blazor) does the same issue happen? I wonder if some of the steps in dotnet/razor@main/docs/CohostingTroubleshooting.md might be helpful here, specifically around additional files.

I could not reproduce this error today using v2.131.79 of the extension, even when turning off the source generator or trying a Razor file that wasn't in the project etc. so unfortunately I'm at a bit of a loss to how you're geting into this situation. If none of the above helps, could you try setting the "Razor Log" level to "Trace" (the little cog next to the dropdown in the Output pane) and providing those logs after reproducing the issue?

Thanks very much!