public void sendPacket(SendServerPacket pk)
{
pk.write();
List <byte> blist = new List <byte>();
byte[] db = pk.ToByteArray();
short len = (short)db.Length;
blist.AddRange(BitConverter.GetBytes(len));
blist.AddRange(db);
nstream.Write(blist.ToArray(), 0, blist.Count);
nstream.Flush();
}