Error when using ExportToWKB on multipart geometry

[RadekMandovec]

When I try use ExportToWKB:

var wkbGeom = GeometryEngine.Instance.ExportToWKB(WkbExportFlags.WkbExportPolygon, geometry);

 I get following error:

System.Exception: 'COMException: An unspecified error has occurred.'

There is mentioned "Does not support curves" in the documentation, but nothing about multiparts. So is it supposed to work on multiparts or not? I tried to create very simple multipart polygon with two squares and it does not work on it either.

[JoshuaBixby · Accepted solution]

Have you tried WkbExportMultiPolygon flag?

[RadekMandovec]

Of course I didn't:-) Now everything works fine! Thank you very much!