LineStyles
The LineStyles collection contains LineStyle objects representing line styles used to display line features or area feature boundaries. Access to collection items is possible both by name and by internal number. An internal number is generated when a style is added to the library. Continuity of style numbers is not guaranteed. Persistence of style internal number in the library is guaranteed until performing GDB reorganization by the GDBEngine::CompactGDB method with the mode == gdbCompactNoKeepISN.