C# CLR

Open-source C# projects categorized as CLR
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Top 4 C# CLR Projects

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CLR

  1. .NET Runtime

    .NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.

    Project mention: Microsoft agentically ports Copilot runtime to Rust for $120K | news.ycombinator.com | 2026-09-21

    Just checked it and I underestimated. Just before the split it was at 54k LOC: <https://github.com/dotnet/runtime/blob/b96f3cc738f7fca9474fb...>

    I’ve also read that a first version of the file came from a LISP-to-CPP code generation step: <https://news.ycombinator.com/item?id=23295041>

  2. ReSharper

    ReSharper is now available in VS Code and Cursor. ReSharper brings a professional toolset for C# developers backed by over 20 years of experience, enterprise-grade security, SOC 2 compliance, and the trust of companies worldwide.

    ReSharper logo

  3. PythonNet

    Python for .NET is a package that gives Python programmers nearly seamless integration with the .NET Common Language Runtime (CLR) and provides a powerful application scripting tool for .NET developers.

  4. Novus

    Low-level utilities and tools for working with the CLR and memory. (by Decimation)

  5. ManagedCorProfiler

    Prototype NET (CLR) Profiler written in C#

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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C# CLR related posts

  • Microsoft agentically ports Copilot runtime to Rust for $120K

    1 project | news.ycombinator.com | 21 Sep 2026

  • GC and Exceptions in Wasmtime

    3 projects | news.ycombinator.com | 25 Jul 2026

  • Correlated randomness in Slay the Spire 2

    2 projects | news.ycombinator.com | 16 Jun 2026

  • Memory management in C# - Part 2: hands-on

    3 projects | dev.to | 18 May 2026

  • Async/Await no .NET 10: Eliminando o Overhead da State Machine

    1 project | dev.to | 4 Mar 2026

  • .NET runtime: Use io_uring for sockets on Linux

    1 project | news.ycombinator.com | 17 Feb 2026

  • Async/Await por Debaixo do Capô: Entendendo I/O Assíncrono no .NET

    1 project | dev.to | 9 Feb 2026
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Index

What are some of the best open-source CLR projects in C#? This list will help you:

# Project Stars
1 .NET Runtime 18,327
2 PythonNet 5,523
3 Novus 41
4 ManagedCorProfiler 27

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