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

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

Json.NET is a popular high-performance JSON framework for .NET

Store securely encrypted backups in the cloud!

Powerful .NET library for benchmarking

Simple REST and HTTP API Client for .NET

A framework that allows developers to cobble together a better UI for their own WPF applications with minimal effort.

Incredibly simple real-time web for .NET

A popular .NET validation library for building strongly-typed validation rules.

Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities

An advanced, composable, functional reactive model-view-viewmodel framework for all .NET platforms that is inspired by functional reactive programming. ReactiveUI allows you to abstract mutable sta…

The Reactive Extensions for .NET

Quartz Enterprise Scheduler .NET

A cross-platform .NET library for IMAP, POP3, and SMTP.

The Windows Community Toolkit is a collection of helpers, extensions, and custom controls. It simplifies and demonstrates common developer tasks building .NET apps with UWP and the Windows App SDK …

The most popular and friendly mocking framework for .NET

A C# implementation of the WebSocket protocol client and server

A simple library for creating state machines in C# code

Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all

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…

Repository for WPF related samples

Protocol Buffers library for idiomatic .NET

A server-side library for sending Push Notifications to iOS (iPhone/iPad APNS), Android (C2DM and GCM - Google Cloud Message), Windows Phone, Windows 8, Amazon, Blackberry, and (soon) FirefoxOS dev…

Umbraco is a free and open source .NET content management system helping you deliver delightful digital experiences.

DotNetty project – a port of netty, event-driven asynchronous network application framework

Emby Server is a personal media server with apps on just about every device.

Simple, powerful, cross-platform SQLite client and ORM for .NET

Open XML SDK by Microsoft

SuperSocket is a light weight, cross platform and extensible socket server application framework.

The .NET MVVM framework for cross-platform solutions, including Android, iOS, MacCatalyst, macOS, tvOS, WPF, WinUI