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# AddCommandHandler(string,Action\<T1, T2, T3, T4, T5, T6, T7, T8, T9>)

Method in [Actions](/2.5/api/csharp/yarn.unity/yarn.unity.actions.md)

## Summary

```csharp
public void AddCommandHandler<T1, T2, T3, T4, T5, T6, T7, T8, T9>(string commandName, Action<T1, T2, T3, T4, T5, T6, T7, T8, T9> handler);
```

## Parameters

| Name                                                 | Description |
| ---------------------------------------------------- | ----------- |
| `string` commandName                                 |             |
| `Action<T1, T2, T3, T4, T5, T6, T7, T8, T9>` handler |             |