How to: Create anchor for delta import record in ECMA 2.0 GetImportEntries

#region FAIL http://social.technet.microsoft.com/Forums/en-US/a2bc4a62-a987-444a-9382-7a37ba49fcf8/getting-missingchangetype-error-during-delta-import-on-callbased-ecma2?forum=ilm2
//csentry.DN = row["dn"].ToString().Trim();
#endregion
/// Lesson learned: DO NOT name one of the columns 'DN'.
/// http://c--shark.blogspot.com/2014/08/lesson-learned-ecma2-do-not-name-one-of.html
csentry.AnchorAttributes.Add(
    AnchorAttribute.Create("SQL_DN", row["dn"].ToString().Trim()));