void CheckZone(FloatingTimeSpan timespan)
{
if (_zone != timespan.Zone)
{
throw new ArgumentException("Cannot relate ObservableDateTime to FloatingTimeSpan with different time zone");
}
}
protected void CheckZone(FloatingTimeSpan other)
{
if (_zone != other._zone)
{
throw new ArgumentException("Cannot relate FloatingTimeSpan instances from two different time zones");
}
}
protected void CheckZone(FloatingTimeSpan other)
{
if (_zone != other._zone)
throw new ArgumentException("Cannot relate FloatingTimeSpan instances from two different time zones");
}