dotnet

dotnet/runtime

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

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README.md

# .NET Runtime

[![Build Status](https://dev.azure.com/dnceng-public/public/_apis/build/status/dotnet/runtime/runtime?branchName=main)](https://dev.azure.com/dnceng-public/public/_build/latest?definitionId=129&branchName=main)
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[![Discord](https://img.shields.io/discord/732297728826277939?style=flat-square&label=Discord&logo=discord&logoColor=white&color=7289DA)](https://aka.ms/dotnet-discord)

* [What is .NET?](#what-is-net)
* [How can I contribute?](#how-can-i-contribute)
* [Reporting security issues and security bugs](#reporting-security-issues-and-security-bugs)
* [Filing issues](#filing-issues)
* [Useful Links](#useful-links)
* [.NET Foundation](#net-foundation)
* [License](#license)

This repo contains the code to build the .NET runtime, libraries and shared host (`dotnet`) installers for
all supported platforms, as well as the sources to .NET runtime and libraries.

## What is .NET?

Official Starting Page: <https://dotnet.microsoft.com>

* [How to use .NET](https://learn.microsoft.com/dotnet/core/get-started) (with VS, VS Code, command-line CLI)
  * [Install official releases](https://dotnet.microsoft.com/download)
  * [Documentation](https://learn.microsoft.com/dotnet/core) (Get Started, Tutorials, Porting from .NET Framework, API reference, ...)
    * [Deploying apps](https://learn.microsoft.com/dotnet/core/deploying)
* [Support](https://github.com/dotnet/core/blob/main/support.md) (Releases, OS Versions, ...)
* [Roadmap](https://github.com/dotnet/core/blob/main/roadmap.md)

## How can I contribute?

We welcome contributions! Many people all over the world have helped make this project better.

* [Contributing](CONTRIBUTING.md) explains what kinds of contributions we welcome
* [Workflow Instructions](docs/workflow/README.md) explains how to build and test
* [Dogfooding .NET](docs/project/dogfooding.md) explains how to get nightly builds of the runtime and its libraries to test them in your own projects.

## Reporting security issues and security bugs

Security issues and bugs should be reported privately to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). You should receive a response within 24 hours. Further information can be found in the [Security TechCenter](https://www.microsoft.com/msrc/faqs-report-an-issue). You can also find these instructions in this repo's [Security doc](SECURITY.md).

Also see info about related [Microsoft .NET Bounty Program](https://www.microsoft.com/msrc/bounty-dot-net-core).

## Filing issues

This repo should contain issues that are tied to the runtime, the class libraries and frameworks, the installation of the `dotnet` binary (sometimes known as the `muxer`) and the installation of the .NET runtime and libraries.

For other issues, please file them to their appropriate sibling repos. We have links to many of them on [our new issue page](https://github.com/dotnet/runtime/issues/new/choose).

## Useful Links

* [.NET source index](https://source.dot.net) / [.NET Framework source index](https://referencesource.microsoft.com)
* [API Reference docs](https://learn.microsoft.com/dotnet/api)
* [.NET API Catalog](https://apisof.net) (incl. APIs from daily builds and API usage info)
* [API docs writing guidelines](https://github.com/dotnet/dotnet-api-docs/wiki) - useful when writing /// comments
* [.NET Discord Server](https://aka.ms/dotnet-discord) - a place to discuss the development of .NET and its ecosystem

## .NET Foundation

.NET Runtime is a [.NET Foundation](https://www.dotnetfoundation.org/projects) project.

There are many .NET related projects on GitHub.

* [.NET home repo](https://github.com/Microsoft/dotnet) - links to 100s of .NET projects, from Microsoft and the community.
* [ASP.NET Core home](https://learn.microsoft.com/aspnet/core) - the best place to start learning about ASP.NET Core.

This project has adopted the code of conduct defined by the [Contributor Covenant](https://contributor-covenant.org) to clarify expected behavior in our community. For more information, see the [.NET Foundation Code of Conduct](https://www.dotnetfoundation.org/code-of-conduct).

General .NET OSS discussions: [.NET Foundation Discussions](https://github.com/dotnet-foundation/Home/discussions)

## License

.NET (including the runtime repo) is licensed under the [MIT](LICENSE.TXT) license.

Repository info

Default branch: main
Latest version: v10.0.12
Created: 2019-09-25
Last activity: 2026-10-13
License: MIT
Open issues: 8.2k
Watchers: 448

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