# FileObjWriteOptions.CurveType enum

Namespace: [Rhino.FileIO](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.fileio.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md) · Since v6.0

```cs
public enum FileObjWriteOptions.CurveType
```

Type of curve used for trimmed surfaces

## Values

| Name | Value | Description |
| --- | --- | --- |
| Polyline | 0 | Polyline approximation, see comments for AngleTolRadians |
| Nurbs | 1 |  |