.NET is a cross-platform runtime and libraries, for cloud, IoT and desktop apps. It includes a garbage collector, JIT compiler, primitive data types and class libraries.

Client Tools for NuGet - including Visual Studio extensions, command line tools, and msbuild support. (Open issues on https://github.com/nuget/home/issues)

PerfView is a CPU and memory performance-analysis tool

Serde.NET is a C# port of the popular Serde serialization library for Rust

dnvm is a command-line interface for installing and updating different dotnet SDKs

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

Implementation of the MessagePack format for Serde.NET

The .NET Compiler Platform ("Roslyn") provides open-source C# and Visual Basic compilers with rich code analysis APIs.

This repo is used for reviewing new .NET designs.

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

The official repo for the design of the C# programming language

.NET SDK for Azure Cosmos DB for the core SQL API

This repository is for development of the Azure MCP Server, bringing the power of Azure to your agents.

Extension for AutoRest (https://github.com/Azure/autorest) that generates C# code

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

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…

This repository contains .NET Documentation.

The official C# SDK for Model Context Protocol servers and clients, maintained by Microsoft

Simple .NET logging with fully-structured events

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