public FilesystemTierEnumCollection FetchAll()
 {
     var coll = new FilesystemTierEnumCollection();
     var qry = new Query(FilesystemTierEnum.Schema);
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }
 public FilesystemTierEnumCollection FetchByQuery(Query qry)
 {
     var coll = new FilesystemTierEnumCollection();
     coll.LoadAndCloseReader(qry.ExecuteReader());
     return coll;
 }