void ReloadAddressList (HeaderId id, InternetAddressList list)
{
// clear the address list and reload
list.Changed -= InternetAddressListChanged;
list.Clear ();
foreach (var header in Headers) {
if (header.Id != id)
continue;
int length = header.RawValue.Length;
List<InternetAddress> parsed;
int index = 0;
if (!InternetAddressList.TryParse (Headers.Options, header.RawValue, ref index, length, false, false, out parsed))
continue;
list.AddRange (parsed);
}
list.Changed += InternetAddressListChanged;
}