## MutationObserverInit.ContainsKey method

Determines whether the [`MutationObserverInit`](../) collection contain a specified key.

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

| Parameter | Type | Description |
| --- | --- | --- |
| key | String | The key to check. |

### Return Value

True if the [`MutationObserverInit`](../) contain a specified key; otherwise, false.

### See Also

* class [MutationObserverInit](../)
* namespace [Aspose.Html.Dom.Mutations](../../../aspose.html.dom.mutations/)
* assembly [Aspose.HTML](../../../)