# EventingSubscriberServiceCollectionExtensions

- Kind: `class`
- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Version: `13.3.0`
- Namespace: `Aspire.Hosting.Lifecycle`
- Target framework: `net8.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/Lifecycle/EventingSubscriberServiceCollectionExtensions.cs)

Provides extension methods for adding event subscribers to the `DependencyInjection.IServiceCollection`.

## Definition

```csharp
namespace Aspire.Hosting.Lifecycle;

public static class EventingSubscriberServiceCollectionExtensions
{
    // ...
}
```

## Methods

- [AddEventingSubscriber(IServiceCollection)](/reference/api/csharp/aspire.hosting/eventingsubscriberservicecollectionextensions/methods.md#addeventingsubscriber-iservicecollection) `extension` `ats ignored` -- Adds a singleton event subscriber of type `T` to the service collection.
- [TryAddEventingSubscriber(IServiceCollection)](/reference/api/csharp/aspire.hosting/eventingsubscriberservicecollectionextensions/methods.md#tryaddeventingsubscriber-iservicecollection) `extension` `ats ignored` -- Attempts to add a singleton event subscriber of type `T` to the service collection.