# AddSystemToUpdateList

> Appends a managed system to the group's update list. The list will be sorted the next time the group is updated.

## Definition

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

## AddSystemToUpdateList(ComponentSystemBase)

Appends a managed system to the group's update list. The list will be sorted the next time the group is updated.

```csharp
public void AddSystemToUpdateList(ComponentSystemBase sys)
```

### Parameters

**** (\[ComponentSystemBase]\(/engine/7000.0/script-reference/unity/entities/componentsystembase)): The system to add.

## AddSystemToUpdateList(SystemHandle)

Appends an unmanaged system to the group's update list. The list will be sorted the next time the group is updated.

```csharp
public void AddSystemToUpdateList(SystemHandle sysHandle)
```

### Parameters

**** (\[SystemHandle]\(/engine/7000.0/script-reference/unity/entities/systemhandle)): The system to add