# IsLinkValid(NavMeshLinkInstance)

> Determines whether the link instance is part of the current data used for navigation.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.AI](/engine/6000.6/script-reference/unityengine/ai.md)
* **Assembly:** UnityEngine.AIModule

```csharp
public static bool IsLinkValid(NavMeshLinkInstance handle)
```

### Parameters

**** (\[NavMeshLinkInstance]\(/engine/6000.6/script-reference/unityengine/ai/navmeshlinkinstance)): The identifier of the link instance to check.

### Returns

| Type                                                          | Description                                                                   |
| ------------------------------------------------------------- | ----------------------------------------------------------------------------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | True if the NavMesh link is added to the navigation system - otherwise false. |