gistfile1.cs

[HttpPost]
public IActionResult Post(CreateEventDto m)
{
  var organizer = new OrganizersService().GetOrganizerDetails( new AuthenticationService().GetCurrentUser());

  if (m.Description == null) throw new ArgumentException();      
  if (m.Title == null) throw new ArgumentException();

  if (m.Starts > m.Ends)
  {
    throw new ArgumentException();
  }

  if (m.Status == "Published")
  {
    if (m.Starts < DateTime.Now) 
    {
      throw new ArgumentException();
    }
    if (m.Capacity <= 0) throw new ArgumentException(); 
    if (m.Tickets.Capacity != m.Capacity) throw new ArgumentException();

    decimal pr = m.Tickets.Capacity * m.Tickets.Cost;
    m.PotentialRevenue = pr;

    new EventListingManager().Notify(m);
  }

  new DataAccessLayer().Save(m);

  return Ok();
}

private decimal CalculatePotentialRevenue(CreateEventDto createEventDto)
{
  return (createEventDto.Tickets.Capacity * createEventDto.Tickets.Cost);
}