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# AddFunction(string,System.Func\<TResult, T1, T2, T3>)

Method in [DialogueRunner](/2.0/api/csharp/yarn.unity/yarn.unity.dialoguerunner.md)

## Summary

```csharp
public void AddFunction<TResult, T1, T2, T3>(string name, System.Func<TResult, T1, T2, T3> implementation)
```

## Parameters

| Name                                              | Description |
| ------------------------------------------------- | ----------- |
| `string` name                                     |             |
| `System.Func<TResult, T1, T2, T3>` implementation |             |

## Type Parameters

| Name | Description                                      |
| ---- | ------------------------------------------------ |
| T3   | The type of the third parameter to the function. |