Hi Sebastien AUROUX,
with the next release, OpenAccess will contain a framework to allow such types to work. The framework can be used to perform mappings to your own UDT or to existing, predefined types (like MDSYS.SDO_GEOMETRY or Microsoft.SqlServer.Types.SqlGeometry) .
In fact, I've just verified if works with SDO_GEOMETRY and SqlGeometry and was able to store/retrieve persistent fields of such type.
Kind regards & stay tuned,
the Telerik team
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