> For the complete documentation index, see [llms.txt](https://docs.wisej.com/api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/api/wisej.services/general/wisej.services.servicelifetime.md).

# ServiceLifetime

Namespace: **Wisej.Services**

Assembly: **Wisej.Framework** (4.0.0.0)

Specifies the lifetime of a service.

{% tabs %}
{% tab title="C#" %}

```csharp
public enum ServiceLifetime : Enum
```

{% endtab %}

{% tab title="VB.NET" %}

```visual-basic
Public Enum ServiceLifetime As [Enum]
```

{% endtab %}
{% endtabs %}

## Fields

| Name          | Description                                                                                                                                                                                                                             |
| ------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Session**   | A new instance of the service is created and cached for the current session; it will be automatically disposed, if it implements an [IDisposable](https://docs.microsoft.com/dotnet/api/system.idisposable), at the end of the session. |
| **Shared**    | A single static instance of the service is available to all sessions.                                                                                                                                                                   |
| **Thread**    | A new instance of the service is created for each new thread; it will be automatically disposed, if it implements an [IDisposable](https://docs.microsoft.com/dotnet/api/system.idisposable), at the end of the request.                |
| **Transient** | A new instance of the service is created every time it's requested. The consumer is responsible for disposing it.                                                                                                                       |

## Used By

| Name                                                                                                                              | Description                                                                                                           |
| --------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- |
| [ServiceProvider.AddService](/api/wisej.services/general/wisej.services.serviceprovider.md#addservice-lifetime)                   | Registers a scoped service.                                                                                           |
| [ServiceProvider.AddOrReplaceService](/api/wisej.services/general/wisej.services.serviceprovider.md#addorreplaceservice-lifetime) | <p>Registers or replaces a scoped service.<br><mark style="color:blue;background-color:green;">Since 4.0.0</mark></p> |


---

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