private void SetDueDate()
        {
            switch (TypeOfService.ToLower())
            {
            case "oil service":
                DueDate = BookedDate.AddDays(2);
                break;

            case "water service":
                DueDate = BookedDate.AddDays(1);
                break;

            default:
                DueDate = BookedDate.AddDays(3);
                break;
            }
        }