-DGNEXPORT command
Exports the current drawing to MicroStation DGN File (*.dgn) format in the command line.

Method
Specify the full path and file name for the exported DGN file.
Note: Type ~ (tilde) to display the Export Drawing As dialog box, which allows you to specify the folder and the name for the DGN file.
Options within the command
- DGN
- Converts reference to DGN.
- DWG
- Keeps reference to DGN.
- Bind
- Binds reference file to the parent DGN.
- Detach
- Detaches external reference.