private void btn_Submit_Click(object sender, EventArgs e)
        {
            // Check to see if both validation checks return true
            if (ValidShareSize() && ValidSharePrice())
            {
                selectedCompany.addSellOrder(Convert.ToDouble(textBox2.Text), Convert.ToInt32(textBox1.Text));
                foreach (Control control in this.Controls)
                {
                    if (control is TextBox)
                    {
                        TextBox textBox = (TextBox)control;
                        textBox.Text = null;
                    }

                    if (control is ComboBox)
                    {
                        ComboBox comboBox = (ComboBox)control;
                        if (comboBox.Items.Count > 0)
                        {
                            comboBox.SelectedIndex = 0;
                        }
                    }
                }
            }
        }
        private void btn_Submit_Click(object sender, EventArgs e)
        {
            // Check to see if both validation checks return true
            if (ValidShareSize() && ValidSharePrice())
            {
                selectedCompany.addSellOrder(Convert.ToDouble(textBox2.Text), Convert.ToInt32(textBox1.Text));
                tempObj       tO;
                NetworkStream nwstream   = client.GetStream();
                string        companymsg = "sellOrder SME/TCP-1.0\nCSeq: " + CSeq++ + " Session: " + sessionNum + " Data: ";
                tO = new tempObj(Convert.ToDouble(textBox2.Text), Convert.ToInt32(textBox1.Text));
                string orders;
                if (selectedCompany.Symbol == "MSFT")
                {
                    orders = JsonConvert.SerializeObject(new { MSFT = tO });
                }
                else if (selectedCompany.Symbol == "AAPL")
                {
                    orders = JsonConvert.SerializeObject(new { AAPL = tO });
                }
                else
                {
                    orders = JsonConvert.SerializeObject(new { FB = tO });
                }

                companymsg += orders;
                //send to server
                byte[] tosend = ASCIIEncoding.ASCII.GetBytes(companymsg);
                nwstream.Write(tosend, 0, tosend.Length);

                //wait for response
                //byte[] read = new byte[client.ReceiveBufferSize];
                //int bytesread = nwstream.Read(read, 0, client.ReceiveBufferSize);
                //string decode = Encoding.ASCII.GetString(read, 0, bytesread);
                foreach (Control control in this.Controls)
                {
                    if (control is TextBox)
                    {
                        TextBox textBox = (TextBox)control;
                        textBox.Text = null;
                    }

                    if (control is ComboBox)
                    {
                        ComboBox comboBox = (ComboBox)control;
                        if (comboBox.Items.Count > 0)
                        {
                            comboBox.SelectedIndex = 0;
                        }
                    }
                }
            }
        }