# GetHashCode()

> Returns the hash code for use in collections.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.Experimental.AI](/engine/6000.5/script-reference/unityengine/experimental/ai.md)
* **Assembly:** UnityEngine.AIModule

> **Warning:**
>
> **Deprecated.** The experimental PolygonId struct has been deprecated. Use NavNode instead.

```csharp
public override int GetHashCode()
```

### Returns

| Type                                                       | Description |
| ---------------------------------------------------------- | ----------- |
| [int](https://learn.microsoft.com/dotnet/api/system.int32) |             |