private void as_read()
        {
            BinaryReader br = new BinaryReader(ns);
            while (ns.CanRead)
            {
                while (!ns.DataAvailable) System.Threading.Thread.Sleep(33);
                if (!ns.CanRead) return;
                int l = br.ReadInt32();
                byte[] buffer = new byte[l];
                ns.Read(buffer, 0, l);
                if (receive != null) receive(buffer);
            }
        }