Help to display selected element of Array

Hello everyone, i am new to C#, i am getting Output :
7E 45 00 FF FF 00 01 0A 00 93 00 00 01 00 00 01 00 02 17 B5 70 20 7E
 
I am using following below Code. I need to display only 17 B5 elements. what should i do ? Thank you !
 

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO.Ports;
 
namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
 
    {
        public Form1()
        {
 
            InitializeComponent();
            serialPort1.Open();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            //configuring the serial port
            serialPort1.PortName = "COM15";
            serialPort1.BaudRate = 115200;
            serialPort1.DataBits = 8;
            serialPort1.Parity = Parity.None;
            serialPort1.StopBits = StopBits.One;
            serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);
 

        }
 
        public enum MessageType { Incoming, Outgoing, Normal, Warning, Error };
 
            private byte[] HexToByte(string msg)
        {
            //remove any spaces from the string
            msg = msg.Replace(" ", "");
            //create a byte array the length of the
            //divided by 2 (Hex is 2 characters in length)
            byte[] comBuffer = new byte[msg.Length / 2];
            //loop through the length of the provided string
            for (int i = 0; i < msg.Length; i += 2)
                //convert each set of 2 characters to a byte
                //and add to the array
                comBuffer[i / 2] = (byte)Convert.ToByte(msg.Substring(i, 2), 16);
            //return the array
            byte[] newbuffer = comBuffer;
            return comBuffer;
        }
 

        private string ByteToHex(byte[] comByte)
        {
            //create a new StringBuilder object
            StringBuilder builder = new StringBuilder(comByte.Length * 3);
            //loop through each byte in the array
            foreach (byte data in comByte)
                //convert the byte to a string and add to the stringbuilder
                builder.Append(Convert.ToString(data, 16).PadLeft(2, '0').PadRight(3, ' '));
            //return the converted value
            return builder.ToString().ToUpper();
        }
 

        #region DisplayData
 
        private void DisplayData(MessageType type, string msg)
        {
           richTextBox1.Invoke(new EventHandler(delegate
            {
                richTextBox1.SelectedText = string.Empty;
 

                richTextBox1.AppendText(msg);
 

                richTextBox1.ScrollToCaret();
 

            }));
        }
        #endregion
 

        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
 
            int bytes = serialPort1.BytesToRead;
            //create a byte array to hold the awaiting data
            byte[] comBuffer = new byte[bytes];
            //read the data and store it
            serialPort1.Read(comBuffer, 0, bytes);
            //display the data to the user
            DisplayData(MessageType.Incoming, ByteToHex(comBuffer) + "\n");
 

        }