public static IDateTime MatchTimeZone(IDateTime dt1, IDateTime dt2)
{
Debug.Assert(dt1 != null && dt2 != null);
// Associate the date/time with the first.
IDateTime copy = dt2.Copy <IDateTime>();
copy.AssociateWith(dt1);
// If the dt1 time does not occur in the same time zone as the
// dt2 time, then let's convert it so they can be used in the
// same context (i.e. evaluation).
if (dt1.TZID != null)
{
if (!string.Equals(dt1.TZID, copy.TZID))
{
return((dt1.TimeZoneObservance != null) ? copy.ToTimeZone(dt1.TimeZoneObservance.Value) : copy.ToTimeZone(dt1.TZID));
}
else
{
return(copy);
}
}
else if (dt1.IsUniversalTime)
{
// The first date/time is in UTC time, convert!
return(new iCalDateTime(copy.UTC));
}
else
{
// The first date/time is in local time, convert!
return(new iCalDateTime(copy.Local));
}
}
