private static byte[] GenerateBlobFromRuleGroups(string keyName, IList <ExTimeZoneRuleGroup> groups)
{
O12TimeZoneFormatter.ExchangeTimeZoneHeader exchangeTimeZoneHeader = new O12TimeZoneFormatter.ExchangeTimeZoneHeader(keyName, (ushort)groups.Count);
int size = exchangeTimeZoneHeader.GetSize();
int num = size + O12TimeZoneFormatter.ExchangeTimeZoneRule.Size * groups.Count;
byte[] array = new byte[num];
int num2 = exchangeTimeZoneHeader.ToBytes(new ArraySegment <byte>(array, 0, size));
foreach (ExTimeZoneRuleGroup exTimeZoneRuleGroup in groups)
{
O12TimeZoneFormatter.TzRuleFlags flag = O12TimeZoneFormatter.TzRuleFlags.None;
if (groups.Count == 1 || (exTimeZoneRuleGroup.EffectiveUtcStart <= DateTime.UtcNow && exTimeZoneRuleGroup.EffectiveUtcEnd > DateTime.UtcNow))
{
flag = O12TimeZoneFormatter.TzRuleFlags.EffectiveTimeZone;
}
int year;
if (exTimeZoneRuleGroup.EffectiveUtcStart != DateTime.MinValue)
{
ExTimeZoneRule ruleForUtcTime = exTimeZoneRuleGroup.GetRuleForUtcTime(exTimeZoneRuleGroup.EffectiveUtcStart);
year = ruleForUtcTime.FromUtc(exTimeZoneRuleGroup.EffectiveUtcStart).Year;
}
else
{
year = exTimeZoneRuleGroup.EffectiveUtcStart.Year;
}
REG_TIMEZONE_INFO regInfo = TimeZoneHelper.RegTimeZoneInfoFromExTimeZoneRuleGroup(exTimeZoneRuleGroup);
O12TimeZoneFormatter.ExchangeTimeZoneRule exchangeTimeZoneRule = new O12TimeZoneFormatter.ExchangeTimeZoneRule(flag, (ushort)year, regInfo);
exchangeTimeZoneRule.ToBytes(new ArraySegment <byte>(array, num2, O12TimeZoneFormatter.ExchangeTimeZoneRule.Size));
num2 += O12TimeZoneFormatter.ExchangeTimeZoneRule.Size;
}
return(array);
}
