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! 🚀

Curated list of awesome Roslyn books, tutorials, open-source projects, analyzers, code fixes, refactorings, and source generators

Alloc-free and fast replacement for Linq, with code generation

Roslyn analyzer that finds usages of APIs that will throw PlatformNotSupportedException on certain platforms.

The ultimate fast alternative to Activator.CreateInstance<T> / new T()

Keyset/Seek/Cursor pagination for Entity Framework Core.

A small front-end framework for Unity's UIToolkit powered by code generation.

AsyncFixer: Async/Await Analyzers and Code Fixes

Roslyn analyzers that aim to help security audit on .NET applications.

Roslyn analyzers for xUnit.net (please open issues in https://github.com/xunit/xunit)

A source code generator for automatically implementing IEquatable<T> using only attributes.

Transform your codebase into an intelligent knowledge base for AI-powered development with Cursor IDE, Google AntiGravity, and MCP-enabled assistants

Roslyn analyzers for writing unit tests with NUnit

Lightweight fork of the .NET Compiler Platform ("Roslyn") by adding a compiler plugin infrastructure

Building unbreakable modular monoliths in .NET. Ensuring that the last feature you build is just as easy to ship as the first.

C# Analyzer Adding Exhaustive Checking of Switch Statements and Expressions

Your codebase - is your Knowledge Graph

A Roslyn-based C# analyzer that detects exception handling patterns in your code

C# immutable records generator

Durian is a collection of Roslyn-based analyzers and source generators that extend the default capabilities of C#.