protected virtual IEnumerable <PolicyTag> GetPolicyTags(MailboxSession mailboxSession) { IEnumerable <PolicyTag> result = new List <PolicyTag>(); if (mailboxSession != null) { PolicyTagList policyTagList = mailboxSession.GetPolicyTagList((Microsoft.Exchange.Data.Directory.SystemConfiguration.RetentionActionType) 0); if (policyTagList != null) { result = policyTagList.Values; } } return(result); }