# Delegate CustomActivityAsyncAction

OptimaJet.Workflow.Core.Plugins.CustomActivityAsyncAction

Namespace: [OptimaJet.Workflow.Core.Plugins](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Plugins/)

```csharp
public delegate Task CustomActivityAsyncAction(WorkflowRuntime runtime, ProcessInstance processInstance, Dictionary<string, string> parameters, CancellationToken token)
```

## Parameters

| Name | Type | Description |
| --- | --- | --- |
| `runtime` | `OptimaJet.Workflow.Core.Runtime.WorkflowRuntime` |  |
| `processInstance` | `OptimaJet.Workflow.Core.Model.ProcessInstance` |  |
| `parameters` | `System.Collections.Generic.Dictionary{System.String,System.String}` |  |
| `token` | `System.Threading.CancellationToken` |  |

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