# borderTopLeftRadius

> The radius of the top-left corner when a rounded rectangle is drawn in the element's box.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.UIElements](/engine/6000.7/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
float borderTopLeftRadius { get; }
```