This add-in can export the currently active sketch geometry into DXF where splines are converted to polylines. The add-in's idea comes from this idea station post: Converting splines to polylines
First see How to install sample Add-Ins and Scripts
Then have a look at the help file
Samples are licensed under the terms of the MIT License. Please see the LICENSE file for full details.
Written by Xiaodong Liang
(Autodesk Developer Network)