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G#

A Go-inspired language for the .NET runtime

G# blends Go's clarity — packages, func, goroutines, channels and defer — with the .NET runtime and its libraries. Source compiles directly to managed assemblies.

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hello.gs
package Hello

import System

func greet(name string) string {
	return "Hello, ${name}!"
}

Console.WriteLine(greet("world"))

Go-inspired syntax

Packages and imports, func declarations, slices and maps, defer, and for … in ranges. Familiar if you know Go, with a few pragmatic differences.

Runs on .NET

G# compiles straight to managed assemblies and runs on the modern .NET runtime. Import any CLR type, call its methods, and ship a normal executable.

Concurrency built in

Launch work with go, communicate over typed chan channels, coordinate with select, and write async/await code over sequences.

Precise numeric types

Width-bearing primitives like int32, uint64, and float64 make the size of every value explicit — no guessing.

Real tooling

A command-line compiler (gsc), an MSBuild SDK, a VS Code extension, a language server, and Portable PDB debugging.

A complete specification

Learn the language from a single, implementation-grounded specification, plus tutorials and an "Effective G#" idioms guide.