# EntityChanges(EntityChangeSet, EntityChangeSet)

> Initializes a new instance of the EntityChanges.

## Definition

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

```csharp
public EntityChanges(EntityChangeSet forwardChangeSet, EntityChangeSet reverseChangeSet)
```

### Parameters

**** (\[EntityChangeSet]\(/engine/7000.0/script-reference/unity/entities/entitychangeset)): Changes to convert a World from a state 'A' to a state 'B'**** (\[EntityChangeSet]\(/engine/7000.0/script-reference/unity/entities/entitychangeset)): Changes to revert a World from a state 'B' to a state 'A'