Read Data properties in LDAP

In LDAP, Property Collection is consisted of string and ActiveDs DataTypes.

For example, if Property.Value is large integer type, this value can cast by ActiveDs.IADsLargeInteger.

this is sample code :

try
{
    string ldap = String.Format("LDAP://{0}", ldapServer);
    DirectoryEntry entry = new DirectoryEntry(ldap);
    entry.Username = SyncmailConstants.DefaultAdminId;
    entry.Password = SyncmailConstants.DefaultAdminPassword;

    DirectorySearcher seacher = new DirectorySearcher(entry, "OU=mailpushcokr");
    SearchResult searchresult = seacher.FindOne();
    DirectoryEntry ouentry = searchresult.GetDirectoryEntry();

    MembershipUserStatics statics = new MembershipUserStatics();
    foreach (DirectoryEntry entity in ouentry.Children)
    {
        if(entity.Properties.Contains("givenName"))
        {
            if (entity.Properties["givenName"].Value.ToString() == "대리점가입자")
            {
                statics.TotalUkeyUserCount++;
                if (!entity.Properties.Contains("lastLogonTimestamp"))
                {
                    statics.UnusedUkeyUserCount++;
                }
            }
            else
            {
                if (!entity.Properties.Contains("lastLogonTimestamp"))
                {
                    statics.UnuseWebUserCount++;
                }
                else
                {
                    ActiveDs.IADsLargeInteger largeIntADSI = (ActiveDs.IADsLargeInteger) entity.Properties["lastLogonTimestamp"][0];
                    Console.WriteLine(largeIntADSI.HighPart);    
                }
            }
            statics.TotalUserCount++;
        }
    }
    return statics;      
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
    return new MembershipUserStatics();   
}