public Concert(string name, TicketQuantity seatingCapacity)
{
Id = Guid.NewGuid().ToString();
Name = name;
SeatingCapacity = seatingCapacity;
TicketsSold = 0;
}
public Result <Tickets> IssueTickets(TicketQuantity quantity)
{
if (TicketsSold + quantity > SeatingCapacity)
{
return(Result.Failure <Tickets>(Errors.NoEnoughTickets));
}
TicketsSold += quantity;
return(Result.Success(new Tickets(this, quantity)));
}