Hi Elia,
Thank you for your interest in syncfusion products.
You can change the polyline default name is can be done by overiding the PolyLineBase Class CreateNode(). Here is the code for doing it,
>>>>
static int i = 0;
protected override Node CreateNode( PointF[] pts )
{
LineBase toReturn = new PolylineNode( pts );
SetDecorator( toReturn );
i++;
toReturn.Name = "Room" + i.ToString();
return toReturn;
}
>>>>
Here is the sample link for your refference,
Sample:
http://websamples.syncfusion.com/samples/Diagram.Windows/F67602/main.htmKindly take a look and let me know if you need further assistance.
Regards,
Ajish.