string recStr = "";
                byte[] recByte = new byte[1024];
                int bytes = 0;                try
                {
                    bytes = socket.Receive(recByte, recByte.Length, 0);
                    recStr += Encoding.Default.GetString(recByte, 0, bytes);
                    this.textBox2.Text = recStr;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }                socket.Shutdown(SocketShutdown.Both);//这里报错                socket.Close();
            }