Populate a custom column in a DataSet Table

[Cartoper]

How does one go about populating a custom column in a DataSet Table?

One field in the target table is a blob. This blob contains a
serialization of a .Net class. The frontend would like to access this
as a .Net class, not as a blob. The goal is to add two new columns to
the DataSet's Table class.

1: Of type object, to unserialize the blob
2: Of type string or int as to setup a parent/child relationship with
another DataSet Table for DataBinding

What is the best way to populate the two custom columns when the
Adapter loads the data from the database?

(The database is a old legacy non Microsoft DB)

Cartoper