# GlobalSystemVersion

> The global system version for which this handle is valid.

## Definition

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

```csharp
public readonly uint GlobalSystemVersion { get; }
```

### Remarks

Attempting to use this type handle with a different system version indicates that the handle is no longer valid; use the [ComponentTypeHandle\<T>.Update](/engine/7000.0/script-reference/unity/entities/componenttypehandle1/update.md) method to incrementally update the version just before use.