# Unity

<!-- Version variant: unity_9; default: [/nservicebus/dependency-injection/unity.md](/nservicebus/dependency-injection/unity.md) -->


> [!WARNING]
> Starting with NServiceBus version 7, the dependency injection container adapter packages are no longer required. NServiceBus directly supports the `Microsoft.Extensions.DependencyInjection` model and third party containers can be integrated using the [NServiceBus.Extensions.DependencyInjection package](/nservicebus/dependency-injection/extensions-dependencyinjection.md) or via the [.NET Generic Host](https://learn.microsoft.com/en-us/dotnet/core/extensions/generic-host).
>
> In NServiceBus version 8, NServiceBus will no longer provide adapters for external dependency injection containers.
>
> Visit the [dependency injection upgrade guide](/nservicebus/upgrades/7to8/dependency-injection.md) for further information.


NServiceBus can be configured to use [Unity](https://github.com/unitycontainer/unity) for dependency injection.


## Default usage

<!-- snippet: Unity -->

```cs
endpointConfiguration.UseContainer<UnityBuilder>();
```

<!-- endsnippet -->


## Using an existing container

<!-- snippet: Unity_Existing -->

```cs
var container = new UnityContainer();
container.RegisterInstance(new MyService());
endpointConfiguration.UseContainer<UnityBuilder>(
    customizations: customizations =>
    {
        customizations.UseExistingContainer(container);
    });
```

<!-- endsnippet -->

## DependencyLifecycle mapping

[`DependencyLifecycle`](/nservicebus/dependency-injection/index.md) maps to [Unity lifetime managers](https://msdn.microsoft.com/en-us/library/ff660872.aspx#Anchor_0) as follows:

| `DependencyLifecycle`                                                                                             | Unity Equivalent                                                                                                        |
|-----------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------|
| [InstancePerCall](/nservicebus/dependency-injection/index.md)                                | [`TransientLifetimeManager`](https://msdn.microsoft.com/en-us/library/microsoft.practices.unity.transientlifetimemanager.aspx)         |
| [InstancePerUnitOfWork](/nservicebus/dependency-injection/index.md)                    | [`HierarchicalLifetimeManager`](https://msdn.microsoft.com/en-us/library/microsoft.practices.unity.hierarchicallifetimemanager.aspx) |
| [SingleInstance](/nservicebus/dependency-injection/index.md)                                  | [`ContainerControlledLifetimeManager`](https://msdn.microsoft.com/en-us/library/microsoft.practices.unity.containercontrolledlifetimemanager.aspx)                          |


## Property Injection

This dependency injection container adapter automatically enables property injection for known types. Use the `Func` overload of `.ConfigureComponent` to get full control over the injected properties if needed.