option is actually used for autoinc primary key columns. In case of a column that is not a primary key but is still populated by the server, you will have to use another option that is set on the class' property and not on the column itself. Just open the diagram, select the InsertedDate property and change the Kind
option to PersistentReadOnly
. This way OpenAccess will not try to persist the value of this property but you will still be able to read it. Hope that helps.
All the best,
the Telerik team