# UnmanagedMetaIndex

> Return the unmanaged type index of the system (\>= 0 for ISystem-type systems), or -1 for managed systems.

## Definition

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

```csharp
public int UnmanagedMetaIndex { get; }
```