G# for Visual Studio

The G# Visual Studio extension provides:

• .gs editing through the bundled G# language server
• first-class CPS support for .gsproj projects
• native build, restore, NuGet, F5, and managed debugging
• native Test Explorer support for xUnit, NUnit, and MSTest adapters
• the six G# Ember, Magma, and Synthwave light/dark themes
• snippets generated from the VS Code extension

Visual Studio 2026 or later is supported. The .NET 10 runtime is required by the bundled language server and G# SDK projects.

Build

Run from a Visual Studio Developer PowerShell:

msbuild src\vs-gsharp\VsGsharp.sln /restore /t:Build /p:Configuration=Release

The VSIX is written to src\vs-gsharp\src\VsGsharp\bin\Release\net472\GSharp.VisualStudio.vsix.

Experimental instance

src\vs-gsharp\scripts\Install-ExperimentalVsix.ps1 -RootSuffix GSharp
src\vs-gsharp\scripts\Invoke-Vs2026Smoke.ps1 `
  -RootSuffix GSharp `
  -SolutionPath path\to\sample.sln

The installer removes only the selected experimental profile's MEF, extension metadata, and project-template indexes, then warms that profile before a solution is opened.

Settings and commands

Tools > Options > G# controls the server lifecycle, formatting, on-type diagnostics, completion-on-dot, reference CodeLens, and parameter/type inlay hints. Language feature changes take effect after Restart Language Server.

Tools > G# contains Restart Language Server, Show Output, and Report Issue. Build, restore, run, debug, and tests use Visual Studio's native commands. Server transitions and the active project are shown transiently in Visual Studio's status bar and recorded in the G# output pane.