color

[tjjacks]

Type: Bug

Issue Description

Steps to Reproduce

Expected Behavior

Actual Behavior

Extension version: 2.140.9
VS Code version: Code 1.136.1 (a44adf7f53e00964ab890f9f8758a334f1fc15bc, 2026-09-03T05:06:41Z)
OS version: Windows_NT x64 10.0.26200
Modes:

Logs

C# log

Details

2026-09-07 12:47:51.941 [info] Locating .NET runtime version 10.0.5
2026-09-07 12:47:53.152 [info] Dotnet path: C:\Program Files\dotnet\dotnet.exe
2026-09-07 12:47:53.152 [info] Activating C# + C# Dev Kit...
2026-09-07 12:47:55.943 [info] info: Program[0]
2026-09-07 12:47:55.943 [info]       Server started with process ID 13940
2026-09-07 12:47:58.811 [info] [Program] Language server initialized
2026-09-07 12:47:58.813 [info] [Program] Monitoring client process 16708 for exit
2026-09-07 12:48:01.707 [info] [initialized] [Microsoft.CodeAnalysis.LanguageServer.FileBasedPrograms.FileBasedProgramsEntryPointDiscovery] Finished discovery in 'c:\Users\tjj2\Field Notes project' in 75 milliseconds
2026-09-07 12:48:23.522 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\tjj2\Field Notes project\FieldNotes\FieldNotes.csproj loaded by C# Dev Kit
2026-09-07 12:48:23.551 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\tjj2\Field Notes project\FieldNotes\FieldNotes.csproj loaded by C# Dev Kit
2026-09-07 12:48:23.566 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\tjj2\Field Notes project\FieldNotes\FieldNotes.csproj loaded by C# Dev Kit
2026-09-07 12:48:23.584 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\tjj2\Field Notes project\FieldNotes\FieldNotes.csproj loaded by C# Dev Kit
2026-09-07 13:56:23.574 [info] [textDocument/didSave] [Microsoft.CodeAnalysis.MSBuild.BuildHostProcessManager] .NET BuildHost started from c:\Users\tjj2\.vscode\extensions\ms-dotnettools.csharp-2.140.9-win32-x64\.roslyn\Microsoft.CodeAnalysis.LanguageServer.exe reloading to start from C:\Program Files\dotnet\dotnet.exe to match necessary SDK location.
2026-09-07 13:56:26.438 [warning] [textDocument/didSave] [LanguageServerProjectLoader] Project C:\Users\tjj2\AppData\Local\Temp\roslyn-canonical-misc\166ce57e-748a-4ae9-b543-b549c3d6614a\Canonical.csproj has unresolved dependencies
2026-09-07 13:56:26.696 [info] [textDocument/didSave] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\Field Notes project\FieldNotes\Services\SprjPackage.cs
2026-09-07 13:56:26.726 [info] [textDocument/didSave] [LanguageServerProjectLoader] Restoring Canonical.csproj: Running dotnet restore on C:\Users\tjj2\AppData\Local\Temp\roslyn-canonical-misc\166ce57e-748a-4ae9-b543-b549c3d6614a\Canonical.csproj
2026-09-07 13:56:26.727 [info] [textDocument/didSave] [Microsoft.CodeAnalysis.LanguageServer.DotnetCliHelper] Using dotnet executable configured on the PATH
2026-09-07 13:56:29.596 [info] [textDocument/didSave] [LanguageServerProjectLoader] Restoring Canonical.csproj:   Determining projects to restore...
2026-09-07 13:56:30.569 [info] [textDocument/didSave] [LanguageServerProjectLoader] Restoring Canonical.csproj:   Restored C:\Users\tjj2\AppData\Local\Temp\roslyn-canonical-misc\166ce57e-748a-4ae9-b543-b549c3d6614a\Canonical.csproj (in 170 ms).
2026-09-07 13:56:30.693 [info] [textDocument/didSave] [LanguageServerProjectLoader] Restore complete
2026-09-07 13:56:30.694 [info] [textDocument/didSave] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:07.7893993
2026-09-07 13:56:31.104 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\Field Notes project\FieldNotes\Services\SprjPackage.cs
2026-09-07 13:56:31.105 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0252168
2026-09-07 14:05:11.686 [info] [textDocument/didSave] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\AppData\Local\Temp\sprj-test\Program.cs
2026-09-07 14:05:11.686 [info] [textDocument/didSave] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0294476
2026-09-07 14:05:12.521 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\tjj2\AppData\Local\Temp\sprj-test\sprj-test.csproj loaded by C# Dev Kit
2026-09-07 14:05:50.542 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\AppData\Local\Temp\sprj-test\Program.cs
2026-09-07 14:05:50.542 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0114498
2026-09-07 14:05:51.006 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\AppData\Local\Temp\sprj-test\Program.cs
2026-09-07 14:05:51.006 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0161066
2026-09-07 14:06:02.541 [info] [textDocument/didSave] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\AppData\Local\Temp\sprj-test\GlobalUsings.cs
2026-09-07 14:06:02.541 [info] [textDocument/didSave] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0191344
2026-09-07 14:06:02.894 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\AppData\Local\Temp\sprj-test\GlobalUsings.cs
2026-09-07 14:06:02.895 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0104238
2026-09-07 15:29:01.700 [info] [textDocument/didSave] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\Field Notes project\FieldNotes\Services\SprjXlsxExport.cs
2026-09-07 15:29:01.701 [info] [textDocument/didSave] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0515043
2026-09-07 15:29:02.174 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\Field Notes project\FieldNotes\Services\SprjXlsxExport.cs
2026-09-07 15:29:02.175 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0330782
2026-09-07 15:29:35.283 [info] [textDocument/didSave] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\Field Notes project\FieldNotes\Platforms\Windows\SprjFileAssociation.cs
2026-09-07 15:29:35.283 [info] [textDocument/didSave] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0189327
2026-09-07 15:29:35.668 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\Field Notes project\FieldNotes\Platforms\Windows\SprjFileAssociation.cs
2026-09-07 15:29:35.668 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0114482
2026-09-07 15:31:59.292 [info] [textDocument/didSave] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\AppData\Local\Temp\sprj-xlsx-test\Program.cs
2026-09-07 15:31:59.292 [info] [textDocument/didSave] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0256879
2026-09-07 15:32:00.592 [info] [serviceBroker/connect] [WorkspaceProjectFactoryService] Project C:\Users\tjj2\AppData\Local\Temp\sprj-xlsx-test\sprj-xlsx-test.csproj loaded by C# Dev Kit
2026-09-07 17:16:22.220 [info] [textDocument/didSave] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\Field Notes project\FieldNotes\Converters\ProjectPathConverter.cs
2026-09-07 17:16:22.220 [info] [textDocument/didSave] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0374117
2026-09-07 17:16:22.697 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Successfully completed load of c:\Users\tjj2\Field Notes project\FieldNotes\Converters\ProjectPathConverter.cs
2026-09-07 17:16:22.697 [info] [workspace/didChangeWatchedFiles] [LanguageServerProjectLoader] Completed (re)load of all projects in 00:00:00.0093420
2026-09-07 17:17:07.266 [error] [textDocument/documentColor] [LSP] System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.VisualStudio.DesignTools.Xaml.LanguageService.LanguageService.Adornments.XamlColorTagCollector.GetColorsAsync(IXamlTree xamlTree, ColorScope colorScope, CancellationToken token)
   at Microsoft.VisualStudio.DesignTools.CodeAnalysis.Handlers.Color.XamlColorHandler.GetColorsAsync(IXamlResourceService resourceService, IXamlTree xamlTree, SourceText text, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.DesignTools.CodeAnalysis.Handlers.Color.XamlColorHandler.HandleRequestAsync(DocumentColorParams request, XamlRequestContext context, CancellationToken cancellationToken)
   at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem`1.StartRequestAsync[TRequest,TResponse](TRequest request, TRequestContext context, IMethodHandler handler, CancellationToken cancellationToken)
2026-09-07 17:17:07.272 [error] Request textDocument/documentColor failed.
  Message: Object reference not set to an instance of an object.
  Code: -32000 
[object Object]

C# LSP Trace Logs log

Details

Environment Information

VSCode version: 1.136.1
C# Extension: 2.140.9
Using OmniSharp: false

Dotnet Information

.NET SDK: Version: 10.0.301 Commit: 96856fd726 Workload version: 10.0.300-manifests.8c7d7c03 MSBuild version: 18.6.4+96856fd72

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26200
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\10.0.301\

.NET workloads installed:
[maui-windows]
Installation Source: VS 18.7.11911.148
Manifest Version: 10.0.20/10.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\10.0.100\microsoft.net.sdk.maui\10.0.20\WorkloadManifest.json
Install Type: Msi

[maccatalyst]
Installation Source: VS 18.7.11911.148
Manifest Version: 26.5.10284/10.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\10.0.100\microsoft.net.sdk.maccatalyst\26.5.10284\WorkloadManifest.json
Install Type: Msi

[ios]
Installation Source: VS 18.7.11911.148
Manifest Version: 26.5.10284/10.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\10.0.100\microsoft.net.sdk.ios\26.5.10284\WorkloadManifest.json
Install Type: Msi

[android]
Installation Source: VS 18.7.11911.148
Manifest Version: 36.1.43/10.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\10.0.100\microsoft.net.sdk.android\36.1.43\WorkloadManifest.json
Install Type: Msi

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: 10.0.9
Architecture: x64
Commit: 901ca94124

.NET SDKs installed:
10.0.301 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 8.0.28 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 8.0.28 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.9 [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]
DOTNET_MULTILEVEL_LOOKUP [0]

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
csdevkit	ms-dotnettools	3.20.199	ms-dotnettools.csdevkit-3.20.199-win32-x64
csharp	ms-dotnettools	2.140.9	ms-dotnettools.csharp-2.140.9-win32-x64
dart-code	Dart-Code	3.142.0	dart-code.dart-code-3.142.0
dotnet-maui	ms-dotnettools	1.16.88	ms-dotnettools.dotnet-maui-1.16.88-win32-x64
flutter	Dart-Code	3.142.0	dart-code.flutter-3.142.0
vscode-dotnet-runtime	ms-dotnettools	3.1.0	ms-dotnettools.vscode-dotnet-runtime-3.1.0

C# Settings

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

System Info

Item	Value
CPUs	13th Gen Intel(R) Core(TM) i3-1315U (8 x 2496)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x8086, DEVICE=0xa7a9 [Intel(R) UHD Graphics], DRIVER_VENDOR=Intel, DRIVER_VERSION=32.0.101.7076 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.8972 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 webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	15.63GB (4.88GB free)
Process Argv	--crash-reporter-id d75c1c22-4898-42b3-add1-3191bcec350e
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
pythonvspyt551cf:31249601
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
4f60g487:31327383
envsactivate1:31551504
editstats-enabled:31346257
478i5457:31544283
cloudbuttont:31379625
3efgi100_wstrepl:31403338
56b7f661:31457055
ec5jj548:31422691
diffpatch-lysithea-24-production:31579328
cp_cls_t_966_ss:31526232
4je02754:31466945
c3h7c220:31478652
ge8j1254_inline_auto_hint_haiku:31490510
cp_cls_c_1081:31454833
conptydll_true:31498968
e9c30283:31461165
c9b86496:31447327
ei9d7968:31496641
chat:31457767
8hig5102:31480529
89g7j272:31518289
i2gc6536:31499202
52612955:31516516
ddid_t:31478206
hmra_i5g22:31518061
7df3h592:31512476
cp_cls_t_1082:31535311
logging_enabled_new:31498466
db5d2638:31499441
jb_cp_cls_t_632:31543129
56dj4588:31512888
32d76977:31512328
ha629193:31508444
jh5f2457_c:31540921
jbcp_cls_pctr_t:31531130
cp_intellij_t_nes:31548657
gf14b233:31526830
ahp-both-windows:31556933
ihg5j128:31534457
9gg7f176:31542112
enable_editor_pane_layout:31569726
allow-none:31555437
36h42362:31564511
c7c27ce7:31554789
1h923230:31564177
0dg73464:31554319
treatment-23-1:31555779
unuse_dynamic_mcp:31555281
0d8dfbc3:31570291
switchtoauto:31559321
0c1h4866:31566224
vrbsty_fls:31561059
session-mark-done:31558131
5b8j3302:31564601
mangle-name-treatment:31572634
signed-out-control:31574474
multiv2:31574985
2bfb8b39:31576696
permission_prompt_treatment:1332566
ccr_pr_nudge_adoption:1319471
vsc_wsm_t:1340632
jidc7660:1370295
auto_mode_treatment:1367907
cfee5631:1379228

[dibarbet]

If you could, would you be able to provide the XAML file or a minimal XAML snippet that triggers the textDocument/documentColor failure? Does it occur in a specific kind of project or on a specific action?