# PlugIn.UnknownUserDataEventArgs class

Namespace: [Rhino.PlugIns](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.plugins.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md)

```cs
public class PlugIn.UnknownUserDataEventArgs : EventArgs
```

Event argument passed to the [PlugIn.UnknownUserData](https://developer.rhino3d.com/api/rhinocommon/type/rhino.plugins.plugin/unknownuserdata.md) event.

## Properties

- [Document](https://developer.rhino3d.com/api/rhinocommon/type/rhino.plugins.plugin.unknownuserdataeventargs/document.md)
- [PlugInId](https://developer.rhino3d.com/api/rhinocommon/type/rhino.plugins.plugin.unknownuserdataeventargs/pluginid.md)