# UxmlUpgradeService()

> Creates a new instance of the UxmlUpgradeService and initializes the list of upgraders by finding all types that implement the IUxmlUpgrader interface. The upgraders are sorted by name for consistent execution order.

## Definition

* **Type:** Constructor
* **Namespace:** [UnityEditor.UIElements](/engine/6000.7/script-reference/unityeditor/uielements.md)
* **Assembly:** UnityEditor

```csharp
public UxmlUpgradeService()
```