Repositories list

• runtime

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

  dotnethelp-wantedhacktoberfest

  dotnethelp-wantedhacktoberfest

  C#

  •

  MIT License

  •5.5k5.5k forks•18k18k stars•7.8k7.8k issues•457457 pull requests•Updated Jun 25, 2026Jun 25, 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

  •309309 forks•1.2k1.2k stars•148148 issues•5151 pull requests•Updated Jun 25, 2026Jun 25, 2026

• skills

  Public
  Repository for skills to assist AI coding agents with .NET and C#

  agent-skills

  agent-skills

  C#

  •

  MIT License

  •258258 forks•3.5k3.5k stars•4848 issues•3030 pull requests•Updated Jun 25, 2026Jun 25, 2026

• skills-data

  Public
  MIT License

  •00 forks•11 star•11 issue•11 pull request•Updated Jun 25, 2026Jun 25, 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•21k21k stars•5.5k5.5k issues•698698 pull requests•Updated Jun 25, 2026Jun 25, 2026

• arcade

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

  C#

  •

  MIT License

  •389389 forks•725725 stars•351351 issues•4444 pull requests•Updated Jun 25, 2026Jun 25, 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•7.7k7.7k stars•1.4k1.4k issues•212212 pull requests•Updated Jun 25, 2026Jun 25, 2026

• windowsdesktop

  Public
  Shell

  •

  MIT License

  •6767 forks•210210 stars•1313 issues•11 pull request•Updated Jun 25, 2026Jun 25, 2026

• diagnostics

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

  C++

  •

  MIT License

  •398398 forks•1.3k1.3k stars•262262 issues•2727 pull requests•Updated Jun 25, 2026Jun 25, 2026

• emsdk

  Public
  Emscripten SDK

  Python

  •

  Other

  •808808 forks•1919 stars•00 issues•55 pull requests•Updated Jun 25, 2026Jun 25, 2026

• vscode-csharp

  Public
  Official C# support for Visual Studio Code

  c-sharpcsharpdotnet+ 2

  c-sharpcsharpdotnetvscodeomnisharp

  TypeScript

  •

  MIT License

  •723723 forks•3.1k3.1k stars•745745 issues•2525 pull requests•Updated Jun 25, 2026Jun 25, 2026

• deployment-tools

  Public
  This repo contains the code to build the .NET deployment tools and installers for all supported platforms, as well as the sources to .NET deployment tools.

  C#

  •

  MIT License

  •6969 forks•213213 stars•3232 issues•55 pull requests•Updated Jun 25, 2026Jun 25, 2026

• source-build-assets

  Public
  IL Assembly

  •

  MIT License

  •7171 forks•5353 stars•99 issues•22 pull requests•Updated Jun 25, 2026Jun 25, 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

  •2k2k forks•23k23k stars•3.8k3.8k issues•185185 pull requests•Updated Jun 25, 2026Jun 25, 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•3.7k3.7k issues•332332 pull requests•Updated Jun 25, 2026Jun 25, 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

  •570570 forks•2.9k2.9k stars•460460 issues•4646 pull requests•Updated Jun 25, 2026Jun 25, 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

  •864864 forks•4.3k4.3k stars•1.1k1.1k issues•119119 pull requests•Updated Jun 25, 2026Jun 25, 2026

• sdk

  Public
  Core functionality needed to create .NET Core projects, that is shared between Visual Studio and CLI

  clivisual-studiosdk+ 1

  clivisual-studiosdkdotnet

  C#

  •

  MIT License

  •1.3k1.3k forks•3.2k3.2k stars•2.3k2.3k issues•154154 pull requests•Updated Jun 25, 2026Jun 25, 2026

• NuGet.BuildTasks

  Public
  The build tasks used to pick up package content from project.lock.json.

  PowerShell

  •

  MIT License

  •6262 forks•4747 stars•1919 issues•11 pull request•Updated Jun 25, 2026Jun 25, 2026

• wcf

  Public
  This repo contains the client-oriented WCF libraries that enable applications built on .NET Core to communicate with WCF services.

  wcfwcf-client

  wcfwcf-client

  C#

  •

  MIT License

  •573573 forks•1.8k1.8k stars•319319 issues•3737 pull requests•Updated Jun 25, 2026Jun 25, 2026

• Scaffolding

  Public
  Code generators to speed up development.

  C#

  •

  MIT License

  •243243 forks•809809 stars•208208 issues•88 pull requests•Updated Jun 25, 2026Jun 25, 2026

• website-thanks-data

  Public
  Console app for creating data file for https://thanks.dot.net

  dotnetdotnet-core

  dotnetdotnet-core

  C#

  •

  MIT License

  •99 forks•99 stars•11 issue•55 pull requests•Updated Jun 25, 2026Jun 25, 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•2.3k2.3k issues•2929 pull requests•Updated Jun 25, 2026Jun 25, 2026

• apisof.net

  Public
  C#

  •

  MIT License

  •3636 forks•125125 stars•2222 issues•55 pull requests•Updated Jun 25, 2026Jun 25, 2026

• SqlClient

  Public
  Microsoft.Data.SqlClient provides database connectivity to SQL Server for .NET applications.

  C#

  •

  MIT License

  •330330 forks•981981 stars•230230 issues•4949 pull requests•Updated Jun 25, 2026Jun 25, 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

  •570570 forks•2.1k2.1k stars•325325 issues•3232 pull requests•Updated Jun 25, 2026Jun 25, 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

  •8787 forks•367367 stars•99 issues•33 pull requests•Updated Jun 25, 2026Jun 25, 2026

• AspNetCore.Docs

  Public
  Documentation for ASP.NET Core

  docsaspnetcoreaspnet+ 2

  docsaspnetcoreaspnetaspaspnet-core

  C#

  •

  Creative Commons Attribution 4.0 International

  •25k25k forks•13k13k stars•566566 issues•77 pull requests•Updated Jun 25, 2026Jun 25, 2026

• dotnet-api-docs

  Public
  .NET API reference documentation (.NET 5+, .NET Core, .NET Framework)

  hacktoberfest

  hacktoberfest

  C#

  •

  Other

  •1.7k1.7k forks•918918 stars•1.6k1.6k issues•111111 pull requests•Updated Jun 24, 2026Jun 24, 2026

• arcade-validation

  Public
  Testing and validation scenarios for https://github.com/dotnet/arcade

  PowerShell

  •

  MIT License

  •3636 forks•2222 stars•00 issues•22 pull requests•Updated Jun 24, 2026Jun 24, 2026