I can Serialize GeometryBase and Point3d, but not Polyline.
error: Type 'Rhino.Collections.Point3dList+XAccess' in Assembly 'RhinoCommon, Version=5.1.30000.17, Culture=neutral, PublicKeyToken=552281e97c755530' is not marked as serializable. (line: 0)
Is Polyline a special case because of the PointList parent? Or is there some pattern about what can be serialized and what not?
I assume (hope) everything derived from GeometryBase can be serialized?