Projects under the stewardship of the .NET Foundation currently include the .NET Compiler Platform ("Roslyn") as well as the ASP.NET family of projects, .NET Core, Xamarin Forms along with popular .NET open source frameworks like xUnit and Reactive Extensions. We’re actively engaged in supporting open source projects in the .NET ecosystem, you can learn more about our work or see our blog for the latest announcements.

Pick a project below to learn more about it and how to contribute:

  • SignalR

    Incredibly simple real-time web for ASP.NET Core

  • System.Drawing

    Mono open source ECMA CLI, C# and .NET implementation.

  • xamarin-macios

    Bridges the worlds of .NET with the native APIs of Mac, iOS, tvOS, and watchOS.

  • xamarin-android

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

  • IdentityServer3

    OpenID Connect Provider and OAuth 2.0 Authorization Server Framework for ASP.NET 4.x/Katana

  • Docs

    Documentation for ASP.NET and ASP.NET Core

  • Umbraco-CMS

    The simple, flexible and friendly ASP.NET CMS used by more than 400.000 websites

  • wcf

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

  • Rx.NET

    The Reactive Extensions for .NET

  • Identity

    ASP.NET Core Identity is the membership system for building ASP.NET Core web applications, including membership, login, and user data.

  • corert

    This repo contains CoreRT, a .NET Core runtime optimized for AOT (ahead of time compilation) scenarios, with the accompanying .NET Native compiler toolchain.

  • docfx

    Tools for building and publishing API documentation for .NET projects

  • corefxlab

    This repo is for experimentation and exploring new ideas that may or may not make it into the main corefx repo.

  • monodevelop

    MonoDevelop is a cross platform IDE mostly aimed at Mono/.NET developers

  • Home

    The Home repository is the starting point for people to learn about ASP.NET Core.

  • project-system

    The C#, F# and Visual Basic project system for Visual Studio

  • docs

    This repository contains .NET Documentation.

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