AcceptReservation.cs

public int? Accept(Reservation reservation)
{
    if (!IsReservationInFuture(reservation))
        return null;
 
    try {
        var reservedSeats =
            ReadReservations(reservation.Date)
            .Sum(r => r.Quantity);
        
        if (Capacity < reservedSeats + reservation.Quantity)
            return null;
    } except {
        return null
    }
 
    reservation.IsAccepted = true;
    return Create(reservation);
}

Part of We should format code on demand blog post

Currently our source code is saved to disk already formatted, and our editors display this saved format. There are many auto formatting tools, but the results always get saved back to disk. What happens if we save to a standardised text representation, and instead format code on demand, in the editor?