Autofac 9.3.4

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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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Autofac on Stack Overflow

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.RegisterType<TaskController>();
builder.RegisterInstance(new TaskController());
builder.RegisterAssemblyTypes(controllerAssembly);

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!

Project

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.

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.

Showing the top 20 packages that depend on Autofac.

Packages Downloads
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
25
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
28
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
30
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
31
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
32
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
33
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
34
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
35
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
36
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
37
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
38
Autofac.Extensions.DependencyInjection
Autofac implementation of the interfaces in Microsoft.Extensions.DependencyInjection.Abstractions, the .NET Framework dependency injection abstraction.
39

Release notes are at https://github.com/autofac/Autofac/releases

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.NET 8.0

.NET Standard 2.0

.NET Standard 2.1

Version Downloads Last updated
9.3.4 1 09/19/2026
9.3.3 0 09/17/2026
9.3.2 3 08/03/2026
9.3.1 3 07/13/2026
9.3.0 10 06/21/2026
9.2.0 6 06/19/2026
9.1.0 15 03/15/2026
9.0.0 24 11/19/2025
8.4.0 26 08/07/2025
8.3.0 30 05/09/2025
8.2.1 36 04/03/2025
8.2.0 40 01/18/2025
8.1.1 31 11/29/2024
8.1.0 32 11/23/2024
8.0.0 32 01/18/2024
7.1.0 35 03/01/2024
7.0.1 38 11/04/2023
7.0.0 36 03/01/2024
6.5.0 33 03/02/2024
6.4.0 41 03/03/2024
6.3.0 31 03/01/2024
6.2.0 46 08/18/2023
6.1.0 38 01/25/2024
6.0.0 41 08/18/2023
5.2.0 43 03/02/2024
5.1.4 32 11/01/2023
5.1.3 31 11/07/2023
5.1.2 31 11/03/2023
5.1.1 32 11/07/2023
5.1.0 30 01/28/2024
5.0.0 36 03/02/2024
4.9.4 29 03/02/2024
4.9.3 33 03/15/2024
4.9.2 33 03/12/2024
4.9.1 31 03/04/2024
4.9.0 37 03/15/2024
4.9.0-beta1 31 03/15/2024
4.8.1 33 03/02/2024
4.8.0 37 03/02/2024
4.7.1 31 11/13/2023
4.7.0 39 03/02/2024
4.6.2 31 03/02/2024
4.6.1 40 03/02/2024
4.6.0 35 03/02/2024
4.5.0 31 03/02/2024
4.4.0 33 10/31/2023
4.3.0 33 03/02/2024
4.2.1 36 01/27/2024
4.2.0 31 03/02/2024
4.1.1 29 03/02/2024
4.1.0 37 03/01/2024
4.0.1 42 03/02/2024
4.0.0 27 03/02/2024
4.0.0-rc3-316 31 03/15/2024
4.0.0-rc3-309 28 01/12/2025
4.0.0-rc3-293 25 03/15/2024
4.0.0-rc3-286 33 03/15/2024
4.0.0-rc3-280 24 03/15/2024
4.0.0-rc2-240 30 03/15/2024
4.0.0-rc1-177 28 03/15/2024
4.0.0-beta8-157 27 03/22/2024
4.0.0-beta7-130 33 03/15/2024
4.0.0-beta6-110 31 03/15/2024
4.0.0-beta5-90 36 03/15/2024
4.0.0-alpha2 34 03/15/2024
4.0.0-alpha1 34 03/15/2024
3.5.2 31 03/02/2024
3.5.0 37 03/02/2024
3.4.1 34 03/02/2024
3.4.0 30 03/02/2024
3.3.1 36 11/09/2023
3.3.0 32 03/01/2024
3.2.0 31 03/02/2024
3.1.5 37 03/02/2024
3.1.4 38 03/05/2024
3.1.3 28 03/02/2024
3.1.1 32 03/02/2024
3.1.0 39 03/28/2024
3.0.2 30 03/12/2024
3.0.1 35 03/13/2024
3.0.0 29 03/02/2024
3.0.0-beta2 34 03/14/2024
3.0.0-beta 29 03/27/2024
2.6.3.862 32 03/15/2024
2.6.2.859 25 03/15/2024
2.6.1.841 25 03/16/2024
2.5.2.830 30 03/15/2024
2.5.1.827 27 03/15/2024
2.4.5.724 29 03/14/2024
2.4.4.705 27 03/15/2024
2.4.3.700 32 03/15/2024
2.4.2.696 33 03/15/2024
2.3.2.632 34 03/16/2024
2.2.4.900 32 03/15/2024