# HttpEventSourceCollection.OnEventSourceUnregistration

Kind: Event  
Namespace: `Sisk.Core.Http.Streams`  
Assembly: `Sisk.Core.dll`  
Source: https://docs.sisk-framework.org/api/Sisk.Core.Http.Streams.HttpEventSourceCollection.OnEventSourceUnregistration.html

## OnEventSourceUnregistration {#Sisk_Core_Http_Streams_HttpEventSourceCollection_OnEventSourceUnregistration}

Represents an event that is fired when an [HttpRequestEventSource](https://docs.sisk-framework.org/api/Sisk.Core.Http.Streams.HttpRequestEventSource.md) is closed and removed from this collection.

```csharp
public event EventSourceUnregistrationHandler? OnEventSourceUnregistration
```

### Event Type

[EventSourceUnregistrationHandler](https://docs.sisk-framework.org/api/Sisk.Core.Http.Streams.EventSourceUnregistrationHandler.md)?