خواندن و نوشتن روی پورت با سی شارپ

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.IO.Ports;
namespace TestWinApp
{
publicpartialclassForm1 : Form
{
public Form1()
{
InitializeComponent();
}
SerialPort serialPort1 = newSerialPort();
privatevoid Form1_Load(object sender, EventArgs e)
{
serialPort1.PortName = "COM1";
serialPort1.BaudRate = 9600;
serialPort1.DataBits = 8;
serialPort1.Parity = Parity.None;
serialPort1.StopBits = StopBits.One;
}

void Button1Click(object sender, EventArgs e)
{
//configuring the serial port
serialPort1.PortName = "COM1";
serialPort1.BaudRate = 9600;
serialPort1.DataBits = 8;
serialPort1.Parity = Parity.None;
serialPort1.StopBits = StopBits.One;
//opening the serial port
serialPort1.Open();
//write data to serial port
serialPort1.Write("ABC");
//close the port
serialPort1.Close();
}
}
}