dotnet/vscode-csharp

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Official C# support for Visual Studio Code

Stars: 3.1k
Forks: 737
Open beginner issues: 0
Indexed issues: 651
Avg merge: 18h 40m
Merged PRs (30d): 31

Dominant language: TypeScript
License: MIT
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

Open All

648 open issues indexed

Improve launch.json Documentation and Examples Open

Debugger untriaged

dotnet/vscode-csharp#8869 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
v2.100.5 and v2.110.4 formatter ignores .editorconfig Open

Editor-Formatting untriaged

dotnet/vscode-csharp#8875 · 2 comments · 3 reactions · 2 assignees · Indexed Sep 15, 2026
Debugging with symbols from searchPath is not working Open

Debugger untriaged

dotnet/vscode-csharp#8891 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Debugging a single file dotnet app with command line arguments is very unclear/obtuse Open

Debugger Feature - Run File untriaged

dotnet/vscode-csharp#8920 · 6 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Code suggestions don't match 'Problems' pane nor are able to be applied Open

OmniSharp untriaged

dotnet/vscode-csharp#8968 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Misidentified syntax error Open

untriaged

dotnet/vscode-csharp#9018 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Language Server attributes package vulnerability warning to wrong project (MessagePack shown for project that doesn't use it) Open

Project System untriaged

dotnet/vscode-csharp#9022 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Starting or exiting Unity causes VS Code file-watcher [1] to stay at ~25% CPU until restart when ms-dotnettools.csharp is enabled Open

Unity untriaged

dotnet/vscode-csharp#9055 · 3 comments · 3 reactions · 0 assignees · Indexed Sep 15, 2026
CLR attach fails with configurationDone 0x80070057 on .NET Framework (Windows) Open

Debugger

dotnet/vscode-csharp#9079 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
didOpen - Unable to parse URI `_claude_vscode_fs_right:...` Open

External-Issue

dotnet/vscode-csharp#9087 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Microsoft.CodeAnalysis.LanguageServer.exe takes up 24-29GB of memory Open

Bug Performance

dotnet/vscode-csharp#9104 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
`DebuggerTypeProxy` generates an invalid expression when runtime and static types differ Open

Bug Debugger Debugger-ExpressionEvaluation

dotnet/vscode-csharp#9108 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Incorrect display language for debugger error messages. Open

Debugger untriaged

dotnet/vscode-csharp#9109 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
XAML documentSymbol, inlayHint, and codeLens requests fail in Roslyn LSP Open

Bug Needs Investigation Roslyn LSP Xaml

dotnet/vscode-csharp#9233 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Language server crashes loading System.Diagnostics.StackTrace on macOS arm64 Open

Bug C#DK Installation Needs Investigation Roslyn LSP

dotnet/vscode-csharp#9306 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Cannot debug wasm based blazor webapp projects after new release Open

C#DK Debugger untriaged

dotnet/vscode-csharp#9310 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Language server fails to recognize new files added via relative path outside project root Open

C#DK untriaged

dotnet/vscode-csharp#9360 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
IntelliSense doesn't work with external projects in file-based apps Open

C#DK untriaged

dotnet/vscode-csharp#9395 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
C# extension should expose LSP tools to GitHub Copilot Open

dotnet/vscode-csharp#9415 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
.NET Open

untriaged

dotnet/vscode-csharp#9421 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
EnergyPal Open

C#DK untriaged

dotnet/vscode-csharp#9437 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
CC# Open

C#DK untriaged

dotnet/vscode-csharp#9441 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Go to definition fails for chat editing snapshots with ArgumentOutOfRangeException Open

Bug C#DK Editor-Go To Definition Needs Investigation Roslyn LSP

dotnet/vscode-csharp#9448 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Semantic tokens are too broad Open

Backlog Feature Request

dotnet/vscode-csharp#9467 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
[WebToolsE2E][Green] After installing C# and C# Dev Kit, will encounter warning: "Found markup element with unexpected name 'PageTitle'" in Blazor Web App. Open

Bug C#DK Razor

dotnet/vscode-csharp#9473 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
documentHighlight - ArgumentOutOfRangeException: The requested line number 14 must be less than the number of lines 12 Open

Bug C#DK Needs Investigation Roslyn LSP

dotnet/vscode-csharp#9479 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
it wont work Open

C#DK untriaged

dotnet/vscode-csharp#9489 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
console autodevelop Open

C#DK untriaged

dotnet/vscode-csharp#9492 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Debugger: first Step Over after Hot Reload inside the patched method's active frame runs away — process runs to completion, re-bound breakpoint never hit (IncompleteStep) Open

Debugger

dotnet/vscode-csharp#9501 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
textDocument/codeAction and hover fail with position out of range Open

Bug Editor-Code Actions Editor-QuickInfo Needs Investigation Roslyn LSP

dotnet/vscode-csharp#9513 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Bugs raised by your product not mine. Open

untriaged

dotnet/vscode-csharp#9534 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Using the C# Debugger shows different Views than when using dotnet run Open

Debugger untriaged

dotnet/vscode-csharp#9554 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
C# Dev Kit missing Command Palette commands and Run button doesn't work on Ubuntu 26.04 lts (F5 works) Open

untriaged

dotnet/vscode-csharp#9578 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
zannie hahn studio Open

untriaged

dotnet/vscode-csharp#9586 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Unpin VS Code version used for integration tests Open

untriaged

dotnet/vscode-csharp#9593 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Encountered exception in the MEF composition at startup Open

Bug C#DK Needs Investigation Roslyn LSP Xaml

dotnet/vscode-csharp#9604 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"Projects" warning in status bar when file-based app .cs file is open in editor Open

Bug Feature - Run File untriaged

dotnet/vscode-csharp#9636 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Offline VSIX omits Roslyn Copilot and VSWebAssemblyBridge dependencies Open

Bug Documentation Installation

dotnet/vscode-csharp#9696 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
C# language server repeatedly exits with SIGKILL on macOS Open

Bug C#DK Reliability Roslyn LSP

dotnet/vscode-csharp#9708 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Remove dependency on WMIC.exe Open

Debugger

dotnet/vscode-csharp#9710 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Language server crashes with AccessViolationException while decompiling XML documentation Open

Bug C#DK Needs Investigation Needs More Info Reliability Roslyn LSP

dotnet/vscode-csharp#9718 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Razor formatting fails with overlapping changes Open

Bug C#DK Editor-Formatting Needs More Info Razor

dotnet/vscode-csharp#9728 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Use C# Dev Kit selected workspace dotnet host for debugger prerequisite checks Open

Debugger untriaged

dotnet/vscode-csharp#9732 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
color Open

Bug C#DK Needs More Info Xaml

dotnet/vscode-csharp#9739 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Hot Reload missing in 2.151.28 Open

Debugger untriaged

dotnet/vscode-csharp#9741 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Corrupted error messages Open

C#DK Needs More Info Razor untriaged

dotnet/vscode-csharp#9742 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`dotnet.generateAssets` persists C# Dev Kit temporary solution paths in build and publish tasks Open

Bug C#DK Launch and Task Assets

dotnet/vscode-csharp#9748 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Blazor debugging captures unrelated debug sessions and terminates them together Open

Debugger untriaged

dotnet/vscode-csharp#9750 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026

dotnet/vscode-csharp

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