> For the complete documentation index, see [llms.txt](https://docs.yarnspinner.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yarnspinner.dev/2.3/api/csharp/yarn.unity/yarn.unity.actions/yarn.unity.actions.addcommandhandler-4.md).

# AddCommandHandler(string,Func\<T1, Coroutine>)

Method in [Actions](/2.3/api/csharp/yarn.unity/yarn.unity.actions.md)

## Summary

```csharp
public void AddCommandHandler<T1>(string commandName, Func<T1, Coroutine> handler);
```

## Parameters

| Name                                             | Description |
| ------------------------------------------------ | ----------- |
| `string` commandName                             |             |
| `System.Func<T1, UnityEngine.Coroutine>` handler |             |