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# AddCommandHandler(string,Func\<T1, T2, T3, Coroutine>)

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

## Summary

```csharp
public void AddCommandHandler<T1, T2, T3>(string commandName, Func<T1, T2, T3, Coroutine> handler);
```

## Parameters

| Name                                  | Description |
| ------------------------------------- | ----------- |
| `string` commandName                  |             |
| `Func<T1, T2, T3, Coroutine>` handler |             |