> For the complete documentation index, see [llms.txt](https://kinematicsoup.gitbook.io/reactor/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kinematicsoup.gitbook.io/reactor/api-reference/ks.reactor/ks.reactor.ksevent-2/ks.reactor.ksevent-2.foreachcancellablecallback.md).

# Delegate ksEvent\<E, T>.ForEachCancellableCallback

Namespace: [KS.Reactor](/reactor/api-reference/ks.reactor.md)\
Assembly: KSCommon.dll

Iterator callback that can cancel iteration by returning false.

```csharp
public delegate bool ksEvent<E, T>.ForEachCancellableCallback(T item)
```

#### Parameters

`item` T

#### Returns

[bool](https://learn.microsoft.com/dotnet/api/system.boolean)

False to cancel iteration.