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