public IActionResult InsertSqlData()
{
SQLInserter sql = new SQLInserter();
_ACRepository.GetAllAircrafts().ToList().ForEach(ac => _ACRepository.DeleteAC(ac)); // Delete All ACs first.
sql._ACList.ForEach(ac => _ACRepository.AddAC(ac)); // Populate DB with SQLInserter data.
return(RedirectToAction(nameof(Index)));
}