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Autofac character Autofac logo

Autofac is an IoC container for Microsoft .NET. It manages the dependencies between classes so that applications stay easy to change as they grow in size and complexity. This is achieved by treating regular .NET classes as components.

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Get Packages

You can get Autofac by grabbing the latest NuGet package. There are several application integration and extended functionality packages to choose from. If you're feeling adventurous, continuous integration builds are on MyGet.

Release notes are available on GitHub.

Get Help

Need help with Autofac? We have a documentation site as well as API documentation. We're ready to answer your questions on Stack Overflow or check out the discussion forum.

Get Started

Our Getting Started tutorial walks you through integrating Autofac with a simple application and gives you some starting points for learning more.

Super-duper quick start:

Register components with a ContainerBuilder and then build the component container.

var builder = new ContainerBuilder();

builder.Register(c => new TaskController(c.Resolve<ITaskRepository>()));
builder.RegisterInstance(new TaskController());

var container = builder.Build();

Resolve services from a lifetime scope - either the container or a nested scope:

var taskController = container.Resolve<TaskController>();

There is a growing number of application integration libraries that make using Autofac with your application a snap. Support for several popular frameworks is also available through the "Extras" packages.

Intrigued? Check out our Getting Started walkthrough!


Autofac is licensed under the MIT license, so you can comfortably use it in commercial applications (we still love contributions though).

File issues in the repo with the associated feature/code.


Autofac is supported by AWS. Thanks for your contribution!

Contributing / Pull Requests

Refer to the Contributor Guide for setting up and building Autofac source.

You can also open this repository right now in VS Code.