public static DateTime SubtractBusinessDays(DateTime baseDate, int businessDaysToSubtract)
{
ParameterValidator.AssertIsNotMinOrMaxDate("baseDate", baseDate);
ParameterValidator.AssertIsPositiveValue("businessDaysToSubtract", businessDaysToSubtract);
DateTime result = baseDate;
int daysSubtracted = 0;
while (daysSubtracted < businessDaysToSubtract)
{
if (result == DateTime.MinValue)
{
string message = "Subtracting the specified number of days results in a value less than minimum allowable date value.";
throw new InvalidOperationException(message);
}
else
{
result = result.AddDays(-1);
if (IsWorkingDay(result))
{
daysSubtracted++;
}
}
}
return(result);
}
public static DateTime AddBusinessDays(DateTime baseDate, int businessDaysToAdd)
{
ParameterValidator.AssertIsNotMinOrMaxDate("baseDate", baseDate);
ParameterValidator.AssertIsPositiveValue("businessDaysToAdd", businessDaysToAdd);
DateTime result = baseDate;
int daysAdded = 0;
while (daysAdded < businessDaysToAdd)
{
if (result == DateTime.MaxValue)
{
string message = "Adding the specified number of days results in a value greater than the maximum allowable date value.";
throw new InvalidOperationException(message);
}
else
{
result = result.AddDays(1);
if (IsWorkingDay(result))
{
daysAdded++;
}
}
}
return(result);
}
