# File3dmThickening 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 File3dmThickening
```

Represents the thickening attached to file3dm object attributes.

## Properties

- [BothSides](https://developer.rhino3d.com/api/rhinocommon/type/rhino.fileio.file3dmthickening/bothsides.md): Specifies whether to thicken to both sides of the surface.
- [Distance](https://developer.rhino3d.com/api/rhinocommon/type/rhino.fileio.file3dmthickening/distance.md): Specifies how thick meshes will be made.
- [OffsetOnly](https://developer.rhino3d.com/api/rhinocommon/type/rhino.fileio.file3dmthickening/offsetonly.md): Specifies whether to only offset the original surface.
- [On](https://developer.rhino3d.com/api/rhinocommon/type/rhino.fileio.file3dmthickening/on.md): Specifies whether the feature is enabled or not.
- [Solid](https://developer.rhino3d.com/api/rhinocommon/type/rhino.fileio.file3dmthickening/solid.md): Specifies whether to make open meshes solid by adding walls when thickening.