public static Period Sum(this Period thisPeriod, Period periodToAdd)
{
if (periodToAdd == null)
{
throw new ArgumentNullException("periodToAdd");
}
if (thisPeriod.period != periodToAdd.period)
{
string message = String.Format("Intervals must be of the same period type and they are not. Interval1 : {0}, interval2 : {1}", thisPeriod.ToString(), periodToAdd.ToString());
throw new Exception(message);
}
string newPeriodMultiplier = (thisPeriod.GetPeriodMultiplier() + periodToAdd.GetPeriodMultiplier()).ToString(CultureInfo.InvariantCulture);
var sum
= new Period
{
period = thisPeriod.period,
periodMultiplier = newPeriodMultiplier
};
return(sum);
}
public static Period Subtract(this Period thisPeriod, Period periodToSubtract)
{
if (periodToSubtract == null)
{
throw new ArgumentNullException("periodToSubtract");
}
if (thisPeriod.period != periodToSubtract.period)
{
string message = String.Format("Periods must be of the same period type. This period '{0}', period to subtract '{1}'", thisPeriod.ToString(), periodToSubtract.ToString());
throw new ArgumentException(message, "periodToSubtract");
}
double multiplier = thisPeriod.GetPeriodMultiplier() - periodToSubtract.GetPeriodMultiplier();
var difference
= new Period
{
period = thisPeriod.period,
periodMultiplier = multiplier.ToString(CultureInfo.InvariantCulture)
};
return(difference);
}
public static string ToString(Period interval)
{
return(interval.ToString());
}
