roslyn

The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.

Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.

A .NET source generator for generating object mappings. No runtime reflection.

A modern, cross platform IDE for .NET, built with .NET & Godot

Roslynator is a set of code analysis tools for C#, powered by Roslyn.

Run C# scripts from the .NET CLI.

Cross-platform C# editor based on Roslyn

Write C# apps with a text editor, nuget and the power of Roslyn!

PeachPie - the PHP compiler and runtime for .NET and .NET Core

A cross-platform C# editor and playground.

PolySharp provides generated, source-only polyfills for C# language features, to easily use all runtime-agnostic features downlevel. Add a reference, set your C# version to latest and have fun! 🚀

OmniSharp server (HTTP, STDIO) based on Roslyn workspaces