internal static REG_TIMEZONE_INFO RegTimeZoneInfoFromExTimeZoneRuleGroup(ExTimeZoneRuleGroup group)
{
REG_TIMEZONE_INFO result = default(REG_TIMEZONE_INFO);
ExTimeZoneRule exTimeZoneRule = group.Rules[0];
ExTimeZoneRule exTimeZoneRule2 = (group.Rules.Count > 1) ? group.Rules[1] : null;
if (exTimeZoneRule2 != null && exTimeZoneRule.Bias > exTimeZoneRule2.Bias)
{
ExTimeZoneRule exTimeZoneRule3 = exTimeZoneRule;
exTimeZoneRule = exTimeZoneRule2;
exTimeZoneRule2 = exTimeZoneRule3;
}
result.Bias = (int)(-(int)exTimeZoneRule.Bias.TotalMinutes);
result.StandardBias = 0;
if (exTimeZoneRule2 != null)
{
result.DaylightBias = (int)(exTimeZoneRule.Bias.TotalMinutes - exTimeZoneRule2.Bias.TotalMinutes);
result.StandardDate = TimeZoneHelper.Win32SystemTimeFromRecurringTime(exTimeZoneRule2.ObservanceEnd);
result.DaylightDate = TimeZoneHelper.Win32SystemTimeFromRecurringTime(exTimeZoneRule.ObservanceEnd);
}
return(result);
}