IfxMonthSpan constructors
IfxMonthSpan(System.Int32 val, IfxTimeUnit timeUnit)
The new instance has only one time unit and it is set to the value val.
The StartTimeUnit and EndTimeUnit are both set to timeUnit.
IfxMonthSpan(System.Int32 _years, System.Int32 _months)
The new instance has a value equal to the sum of _years years
and _months months. Negative values are
allowed.