Summary
dotnet.ensureDotnetDependencies does not appear to install the required libicu dependencies correctly on Linux under WSL. After invoking the command against the acquired .NET executable, running dotnet --info still fails with the missing ICU dependency error.
Repro steps
On Ubuntu using WSL, acquire .NET with the extension, then run:
await vscode.commands.executeCommand('dotnet.ensureDotnetDependencies', {
command: acquireResult.dotnetPath,
arguments: ['--info']
});Then run:
/home/shech/.config/Code/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/dotnet --info
Expected behavior
The dependency installer restores/installs the required Linux dependencies, including libicu, so the acquired .NET executable can run successfully.
Actual behavior
The dependency installation flow reports a failure, and dotnet --info still fails because ICU is missing:
Process terminated.
Couldn't find a valid ICU package installed on the system. Please install libicu (or icu-libs) using your package manager and try again. Alternatively you can set the configuration flag System.Globalization.Invariant to true if you want to run with no globalization support. Please see https://aka.ms/dotnet-missing-libicu for more information.
at System.Environment.FailFast(System.Runtime.CompilerServices.StackCrawlMarkHandle, System.String, System.Runtime.CompilerServices.ObjectHandleOnStack, System.String)
at System.Environment.FailFast(System.Threading.StackCrawlMark ByRef, System.String, System.Exception, System.String)
at System.Environment.FailFast(System.String)
at System.Globalization.GlobalizationMode+Settings..cctor()
at System.Globalization.CultureData.CreateCultureWithInvariantData()
at System.Globalization.CultureData.get_Invariant()
at System.Globalization.TextInfo..cctor()
at System.String.ToLowerInvariant()
at System.Text.EncodingHelper.GetEncodingFromCharset()
at System.ConsolePal.GetConsoleEncoding()
at System.Console.get_OutputEncoding()
at Microsoft.DotNet.Cli.AutomaticEncodingRestorer..ctor()
at Microsoft.DotNet.Cli.Program.Main(System.String[])
Aborted /home/shech/.config/Code/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/dotnet --info
The extension notification first says:
Failed to run .NET runtime. You may be missing key Linux libraries. Install them now?
After choosing install, it reports:
The dependency installer failed. Try installing dependencies manually.
Environment
- Extension:
ms-dotnettools.vscode-dotnet-runtime version 3.1.0
- OS: Linux x64 under WSL2
- Kernel:
Linux CPC-shech-BS4DQ 6.6.114.1-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Mon Dec 1 20:46:23 UTC 2025 x86_64 GNU/Linux
- VS Code:
- Version:
1.124.0
- Commit:
1b50d58d73426c9171299ec4037d01365d995b78
- Date:
2026-06-09T21:29:32-07:00
- Electron:
42.2.0
- ElectronBuildId:
14159160
- Chromium:
148.0.7778.97
- Node.js:
24.15.0
- V8:
14.8.178.14-electron.0
- OS:
Linux x64 6.6.114.1-microsoft-standard-WSL2 snap
Additional context
Screenshots show the extension prompts:
Failed to run .NET runtime. You may be missing key Linux libraries. Install them now?The dependency installer failed. Try installing dependencies manually.
Summary
dotnet.ensureDotnetDependenciesdoes not appear to install the requiredlibicudependencies correctly on Linux under WSL. After invoking the command against the acquired .NET executable, runningdotnet --infostill fails with the missing ICU dependency error.Repro steps
On Ubuntu using WSL, acquire .NET with the extension, then run:
Then run:
Expected behavior
The dependency installer restores/installs the required Linux dependencies, including
libicu, so the acquired .NET executable can run successfully.Actual behavior
The dependency installation flow reports a failure, and
dotnet --infostill fails because ICU is missing:The extension notification first says:
After choosing install, it reports:
Environment
ms-dotnettools.vscode-dotnet-runtimeversion3.1.0Linux CPC-shech-BS4DQ 6.6.114.1-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Mon Dec 1 20:46:23 UTC 2025 x86_64 GNU/Linux1.124.01b50d58d73426c9171299ec4037d01365d995b782026-06-09T21:29:32-07:0042.2.014159160148.0.7778.9724.15.014.8.178.14-electron.0Linux x64 6.6.114.1-microsoft-standard-WSL2 snapAdditional context
Screenshots show the extension prompts:
Failed to run .NET runtime. You may be missing key Linux libraries. Install them now?The dependency installer failed. Try installing dependencies manually.