nMail.Pop3.GetStatus C# (CSharp) Метод

        public void GetStatus(int no)
        {
            if(_socket == (IntPtr)ErrorSocket) {
                throw new InvalidOperationException();
            }
            if(no <= 0) {
                throw new ArgumentOutOfRangeException();
            }
            SetHeaderSize();
            _subject = new StringBuilder(_header_size);
            _date = new StringBuilder(_header_size);
            _from = new StringBuilder(_header_size);
            _header = new StringBuilder(_header_size);
            _err = Pop3GetMailStatus(_socket, no, _subject, _date, _from, _header, false);
            if(_err < 0)
            {
                throw new nMailException("GetStatus: " + Options.ErrorMessage, _err);
            }
        }