# PoisonUnusedDataInAllChunks(EntityArchetype, byte)

> Sets all unused chunk data for an archetype to the specified byte value.

## Definition

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

```csharp
public void PoisonUnusedDataInAllChunks(EntityArchetype archetype, byte value)
```

### Parameters

**** (\[EntityArchetype]\(/engine/7000.0/script-reference/unity/entities/entityarchetype)): The archetype to modify**** (\[byte]\(https\://learn.microsoft.com/dotnet/api/system.byte)): The value to set for any unused chunk data