public EstimateTimelineCollection FetchAll()
 {
     EstimateTimelineCollection coll = new EstimateTimelineCollection();
     Query qry = new Query(EstimateTimeline.Schema);
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }
 public EstimateTimelineCollection FetchByQuery(Query qry)
 {
     EstimateTimelineCollection coll = new EstimateTimelineCollection();
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }