private static void UpdateWelcomeMessageSentState(int? siteMailboxInternalState, MailboxSession session)
{
int num = (siteMailboxInternalState == null) ? 1 : (siteMailboxInternalState.Value | 1);
session.Mailbox.SetProperties(new PropertyDefinition[]
{
MailboxSchema.SiteMailboxInternalState
}, new object[]
{
num
});
CoreObject.GetPersistablePropertyBag((CoreMailboxObject)session.Mailbox.CoreObject).FlushChanges();
}
