# SlowPrimaryTextAttribute class

Namespace: [Grasshopper2.Types.Assistant](https://developer.rhino3d.com/api/gh2/namespace/grasshopper2.types.assistant.md) · Assembly: [Grasshopper2](https://developer.rhino3d.com/api/gh2/assembly/grasshopper2.md)

```cs
[AttributeUsage(AttributeTargets.Class)]
public sealed class SlowPrimaryTextAttribute : Attribute
```

Attach this attribute to a [ITypeAssistant](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.assistant.itypeassistant.md) class to indicate that the [ITypeAssistant.DescribePrimary(IPear)](https://developer.rhino3d.com/api/gh2/type/grasshopper2.types.assistant.itypeassistant/describeprimary.md) method is potentially slow and must be called on a separate thread.