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

Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The most popular .NET UI client technology

Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics

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

Dapper - a simple object mapper for .Net

Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

ASP.NET Boilerplate - Web Application Framework

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

Powerful .NET library for benchmarking

Cloud Native application framework for .NET

An easy way to perform background job processing in .NET and .NET Core applications. No Windows Service or separate process required

This repository has examples of broken patterns in ASP.NET Core applications

Simple .NET logging with fully-structured events

GraphQL for .NET

a .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.

Play your favorite games in a borderless window; no more time consuming alt-tabs.

This repository is for active development of the Azure SDK for .NET. For consumers of the SDK we recommend visiting our public developer docs at https://learn.microsoft.com/dotnet/azure/ or our ver…

A simple ACME client for Windows (for use with Let's Encrypt et al.)

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

Extensible tool for weaving .net assemblies

xUnit.net is a free, open source, community-focused unit testing tool for .NET.

SSH.NET is a Secure Shell (SSH) library for .NET, optimized for parallelism.

Lightweight and fast library written in C# for reading Microsoft Excel files

A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.7, as well as .NET Core 2.1, .NET …

Vim Emulator Plugin for Visual Studio 2015+

An easy service hosting framework for building Windows services using .NET

Tools and libraries to glue C/C++ APIs to high-level languages

ASP.NET Core rate limiting middleware

Linq to database provider.

Cosmos is an operating system "construction kit". Build your own OS using managed languages such as C#, VB.NET, and more!