Itenso.TimePeriod.Month.GetPreviousMonth C# (CSharp) Method

        public Month GetPreviousMonth()
        {
            return AddMonths( -1 );
        }

        } // StartYearVisit

        // ----------------------------------------------------------------------
        protected Month StartMonthVisit(Month month, TContext context = null, SeekDirection?visitDirection = null)
        {
            if (month == null)
            {
                throw new ArgumentNullException("month");
            }

            if (visitDirection == null)
            {
                visitDirection = SeekDirection;
            }

            OnVisitStart();

            // iteration limits
            Month    lastVisited = null;
            DateTime minStart    = DateTime.MinValue;
            DateTime maxEnd      = DateTime.MaxValue.AddMonths(-1);

            while (month.Start > minStart && month.End < maxEnd)
            {
                if (OnVisitMonth(month, context) == false)
                {
                    lastVisited = month;
                    break;
                }
                switch (visitDirection)
                {
                case SeekDirection.Forward:
                    month = month.GetNextMonth();
                    break;

                case SeekDirection.Backward:
                    month = month.GetPreviousMonth();
                    break;
                }
            }

            OnVisitEnd();

            return(lastVisited);
        } // StartMonthVisit