# Invalid()

> Reports whether this ArchetypeChunk instance is invalid.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

```csharp
public readonly bool Invalid()
```

### Returns

| Type                                                          | Description                                                                                                                                                             |
| ------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | True, if no [ArchetypeChunk.Archetype](/engine/7000.0/script-reference/unity/entities/archetypechunk/archetype.md) is associated with the this ArchetypeChunk instance. |