# IGrainBase.OnActivateAsync(CancellationToken)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.igrainbase/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.core.abstractions/orleans.igrainbase/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core.Abstractions/Core/IGrainBase.cs#L25)

```csharp
public virtual Task OnActivateAsync(CancellationToken token)
```

Method overridden by grain implementations to handle activation.

### Parameters

- `token` (`CancellationToken`): The cancellation token used to signify that activation should abort promptly.

### Returns

A `System.Threading.Tasks.Task` which represents the operation.