# File3dmPlugInData class

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

```cs
public class File3dmPlugInData
```

Represents custom plug-in data, in the 3dm file, written by a plug-in.

## Properties

- [PlugInId](https://developer.rhino3d.com/api/rhinocommon/type/rhino.fileio.file3dmplugindata/pluginid.md): Gets the id of the plug-in that is associated with this custom data.