private bool ValidateWriteOffTicketsCommand() { return(CurrentRollInfo.NotNull() && FirstTicketNumber == CurrentRollInfo.NextTicket && LastTicketNumber >= FirstTicketNumber && CurrentRollInfo.TicketsLeft >= (LastTicketNumber - CurrentRollInfo.NextTicket)); }
private bool ValidateWriteOffTicketsCommand() { return(CurrentRollInfo.NotNull() && CurrentShift.NotNull() && CurrentShift.Active); }