Repositories list

• runtime

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

  dotnethelp-wantedhacktoberfest

  dotnethelp-wantedhacktoberfest

  C#

  •

  MIT License

  •5.4k5.4k forks•18k18k stars•7.8k7.8k issues•399399 pull requests•Updated May 4, 2026May 4, 2026

• dotnet

  Public
  Home of .NET's Virtual Monolithic Repository which includes all the code needed to build the .NET SDK.

  dotnetmonorepo

  dotnetmonorepo

  C#

  •

  MIT License

  •284284 forks•1.1k1.1k stars•155155 issues•4343 pull requests•Updated May 4, 2026May 4, 2026

• eShop

  Public
  A reference .NET application implementing an eCommerce site

  C#

  •

  MIT License

  •3.6k3.6k forks•10k10k stars•107107 issues•6565 pull requests•Updated May 4, 2026May 4, 2026

• dotnet-monitor

  Public

  dotnet/dotnet-monitor’s past year of commit activity
  This repository contains the source code for .NET Monitor - a tool that allows you to gather diagnostic data from running applications using HTTP endpoints

  C#

  •

  MIT License

  •123123 forks•706706 stars•127127 issues•2020 pull requests•Updated May 4, 2026May 4, 2026

• dotnet-operator-sdk

  Public
  KubeOps is a Kubernetes operator sdk in dotnet. Strongly inspired by kubebuilder.

  kubernetessdkdotnet+ 3

  kubernetessdkdotnetoperatorcrdskubernetes-operator-sdk

  C#

  •

  Apache License 2.0

  •8686 forks•362362 stars•2323 issues•55 pull requests•Updated May 3, 2026May 3, 2026

• aspnetcore

  Public
  ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.

  dotnetaspnetcorehelp-wanted+ 1

  dotnetaspnetcorehelp-wantedhacktoberfest

  C#

  •

  MIT License

  •11k11k forks•38k38k stars•3.6k3.6k issues•279279 pull requests•Updated May 3, 2026May 3, 2026

• roslyn

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

  visual-studiocsharproslyn+ 2

  visual-studiocsharproslynvisual-basichacktoberfest

  C#

  •

  MIT License

  •4.3k4.3k forks•20k20k stars•5.5k5.5k issues•693693 pull requests•Updated May 3, 2026May 3, 2026

• core

  Public
  .NET news, announcements, release notes, and more!

  dotnetdotnet-core

  dotnetdotnet-core

  PowerShell

  •

  MIT License

  •5k5k forks•22k22k stars•335335 issues•1717 pull requests•Updated May 3, 2026May 3, 2026

• razor

  Public
  Compiler and tooling experience for Razor ASP.NET Core apps in Visual Studio and VS Code.

  aspnethacktoberfest

  aspnethacktoberfest

  C#

  •238238 forks•709709 stars•635635 issues•2727 pull requests•Updated May 3, 2026May 3, 2026

• android

  Public
  .NET for Android provides open-source bindings of the Android SDK for use with .NET managed languages such as C#

  C#

  •

  MIT License

  •569569 forks•2.1k2.1k stars•409409 issues•4141 pull requests•Updated May 3, 2026May 3, 2026

• efcore

  Public
  EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.

  c-sharpormdatabase+ 6

  c-sharpormdatabaseentity-frameworkdotnet-coredotnet-standardhacktoberfestdotnet-frameworkaspnet-product

  C#

  •

  MIT License

  •3.4k3.4k forks•15k15k stars•2.4k2.4k issues•4242 pull requests•Updated May 3, 2026May 3, 2026

• winforms

  Public
  Windows Forms is a .NET UI framework for building Windows desktop applications.

  winformsdesktophelp-wanted+ 2

  winformsdesktophelp-wantedwindows-formshacktoberfest

  C#

  •

  MIT License

  •1.1k1.1k forks•4.8k4.8k stars•721721 issues•9292 pull requests•Updated May 3, 2026May 3, 2026

• BenchmarkDotNet

  Public
  Powerful .NET library for benchmarking

  c-sharpbenchmarkingbenchmark+ 4

  c-sharpbenchmarkingbenchmarkperformancecsharpdotnethacktoberfest

  C#

  •

  MIT License

  •1.1k1.1k forks•11k11k stars•149149 issues•3636 pull requests•Updated May 3, 2026May 3, 2026

• maui

  Public
  .NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.

  androidmicrosoftios+ 10

  androidmicrosoftiosmulti-platformmobiledotnetdesktopuser-interfacehacktoberfestmaui+ 3

  C#

  •

  MIT License

  •1.9k1.9k forks•23k23k stars•3.7k3.7k issues•302302 pull requests•Updated May 3, 2026May 3, 2026

• dev-proxy

  Public
  Simulate API failures, throttling, and chaos — all from your command line.

  httpdevelopmentrest+ 12

  httpdevelopmentrestproxymock-serverdevtoolsopenapideveloper-toolsapi-testinghacktoberfest+ 5

  C#

  •

  MIT License

  •8484 forks•788788 stars•2626 issues•77 pull requests•Updated May 3, 2026May 3, 2026

• maui-labs

  Public
  Experimental and pre-release tools for .NET MAUI

  androidmicrosoftios+ 10

  androidmicrosoftiosmulti-platformmobileaidotnetmcpdesktopuser-interface+ 3

  C#

  •

  MIT License

  •1212 forks•101101 stars•3131 issues•2929 pull requests•Updated May 3, 2026May 3, 2026

• yarp

  Public
  A toolkit for developing high-performance HTTP reverse proxy applications.

  C#

  •

  MIT License

  •911911 forks•9.5k9.5k stars•181181 issues•99 pull requests•Updated May 3, 2026May 3, 2026

• performance

  Public
  This repo contains benchmarks used for testing the performance of all .NET Runtimes

  F#

  •

  MIT License

  •297297 forks•762762 stars•209209 issues•5353 pull requests•Updated May 3, 2026May 3, 2026

• wpf

  Public
  WPF is a .NET Core UI framework for building Windows desktop applications.

  dotnetwpfhelp-wanted

  dotnetwpfhelp-wanted

  C#

  •

  MIT License

  •1.3k1.3k forks•7.6k7.6k stars•1.4k1.4k issues•211211 pull requests•Updated May 3, 2026May 3, 2026

• emsdk

  Public
  Emscripten SDK

  Shell

  •

  Other

  •807807 forks•1717 stars•00 issues•1313 pull requests•Updated May 3, 2026May 3, 2026

• windowsdesktop

  Public
  Shell

  •

  MIT License

  •6666 forks•207207 stars•1414 issues•00 pull requests•Updated May 3, 2026May 3, 2026

• command-line-api

  Public
  Command line parsing, invocation, and rendering of terminal output.

  parserterminalparsing+ 10

  parserterminalparsingcommand-lineposixdotnet-coredotnet-standardvt100hacktoberfestcompletions+ 3

  C#

  •

  MIT License

  •418418 forks•3.7k3.7k stars•443443 issues•3636 pull requests•Updated May 3, 2026May 3, 2026

• templating

  Public
  This repo contains the Template Engine which is used by dotnet new

  dotnetdotnet-template

  dotnetdotnet-template

  397397 forks•1.7k1.7k stars•209209 issues•1313 pull requests•Updated May 3, 2026May 3, 2026

• diagnostics

  Public
  This repository contains the source code for various .NET Core runtime diagnostic tools and documents.

  C++

  •

  MIT License

  •394394 forks•1.3k1.3k stars•255255 issues•3131 pull requests•Updated May 3, 2026May 3, 2026

• arcade

  Public
  Tools that provide common build infrastructure for multiple .NET Foundation projects.

  C#

  •

  MIT License

  •385385 forks•721721 stars•421421 issues•4343 pull requests•Updated May 3, 2026May 3, 2026

• source-build-assets

  Public
  C#

  •

  MIT License

  •7070 forks•5252 stars•1515 issues•55 pull requests•Updated May 3, 2026May 3, 2026

• macios

  Public
  .NET for iOS, Mac Catalyst, macOS, and tvOS provide open-source bindings of the Apple SDKs for use with .NET managed languages such as C#

  macosiosxamarin+ 4

  macosiosxamarincsharpdotnettvoswatchos

  C#

  •

  Other

  •565565 forks•2.9k2.9k stars•458458 issues•4444 pull requests•Updated May 3, 2026May 3, 2026

• fsharp

  Public
  The F# compiler, F# core library, F# language service, and F# tooling integration for Visual Studio

  visual-studiotoolscompiler+ 5

  visual-studiotoolscompilerfsharpfunctional-programmingdotnetnetcoreintellisense

  F#

  •

  MIT License

  •859859 forks•4.3k4.3k stars•1.2k1.2k issues•8787 pull requests•Updated May 3, 2026May 3, 2026

• msbuild

  Public
  The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio.

  microsoftvisual-studiobuild+ 3

  microsoftvisual-studiobuildmsbuildhelp-wantedhacktoberfest

  C#

  •

  MIT License

  •1.4k1.4k forks•5.5k5.5k stars•1.5k1.5k issues•112112 pull requests•Updated May 3, 2026May 3, 2026

• runtime-assets

  Public
  Assets that are required by the runtime repository, and referenced as nuget packages.

  C#

  •

  MIT License

  •6565 forks•3535 stars•22 issues•77 pull requests•Updated May 3, 2026May 3, 2026