# DocumentOpenEventArgs class

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

```cs
public class DocumentOpenEventArgs : DocumentEventArgs
```

Provides document information for RhinoDoc events.

## Properties

- [FileName](https://developer.rhino3d.com/api/rhinocommon/type/rhino.documentopeneventargs/filename.md): Name of file being opened.
- [Merge](https://developer.rhino3d.com/api/rhinocommon/type/rhino.documentopeneventargs/merge.md): true if file is being merged into the current document. This occurs during the "Import" command.
- [Reference](https://developer.rhino3d.com/api/rhinocommon/type/rhino.documentopeneventargs/reference.md): true if file is opened as a reference file.

## Inherited Members

- From [DocumentEventArgs](https://developer.rhino3d.com/api/rhinocommon/type/rhino.documenteventargs.md): [Document](https://developer.rhino3d.com/api/rhinocommon/type/rhino.documenteventargs/document.md), [DocumentId](https://developer.rhino3d.com/api/rhinocommon/type/rhino.documenteventargs/documentid.md), [DocumentSerialNumber](https://developer.rhino3d.com/api/rhinocommon/type/rhino.documenteventargs/documentserialnumber.md)