public void RemoveOccurrenceRow(OccurrenceRow row)
 {
     this.Rows.Remove(row);
 }
 public OccurrenceRowChangeEvent(OccurrenceRow row, DataRowAction action)
 {
     this.eventRow = row;
     this.eventAction = action;
 }
 public void AddOccurrenceRow(OccurrenceRow row)
 {
     this.Rows.Add(row);
 }