> 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/api/csharp/yarn.unity/yarn.unity.serializabledictionarybase-2/yarn.unity.serializabledictionarybase.containskey.md).

# ContainsKey(TKey)

Method in [SerializableDictionaryBase\<TKey, TValue, TValueStorage>](/api/csharp/yarn.unity/yarn.unity.serializabledictionarybase-2.md)

## Summary

```csharp
public bool ContainsKey(TKey key)
```

## Parameters

| Name       | Description |
| ---------- | ----------- |
| `TKey` key |             |