Displaying Chart for serial data received through serial port.

[Sakura17]

I am working on serial port programming. Here in my case, continuous set of data is coming through a serial port and i want to display that data in chart. means each time a new set of data is received the chart should change according to the value.
My problem is when i am using message box it is working. but when i remove the message box, the chart is not appearing. What should i do? here is my code which is working...

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
using System.Threading;

namespace MaintainGraph
{
    public partial class Form1 : Form
    {
     
        public Form1()
        {
            InitializeComponent();
            //ResizeRedraw = true;
        }

        private void rcv_btn_Click(object sender, EventArgs e)
        {
            SerialPort port = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);
            try
            {
                if (!port.IsOpen)
                    port.Open();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            Thread.Sleep(2000);
            port.ReadTimeout = 1000;
            while (true)
            {
                double[] arr = new double[6];
                try
                {
                    arr[0] = Convert.ToDouble(port.ReadLine());
                    arr[1] = Convert.ToDouble(port.ReadLine());
                    arr[2] = Convert.ToDouble(port.ReadLine());
                    arr[3] = Convert.ToDouble(port.ReadLine());
                    arr[4] = Convert.ToDouble(port.ReadLine());
                    arr[5] = Convert.ToDouble(port.ReadLine());
                }
                
                catch (System.TimeoutException ex)
                {
                }
               
                
                MessageBox.Show("Hello");

                txt.Text = arr[0] + " " + arr[1] + " " + arr[2] + " " + arr[3] + " " + arr[4] + " " + arr[5];
                this.chart1.Series["Values"].Points.AddXY("Depth", arr[0]);
                this.chart1.Series["Values"].Points.AddXY("PositionX", arr[1]);
                this.chart1.Series["Values"].Points.AddXY("PositionY", arr[2]);
                this.chart1.Series["Values"].Points.AddXY("Heading", arr[3]);
                this.chart1.Series["Values"].Points.AddXY("Surge", arr[4]);
                this.chart1.Series["Values"].Points.AddXY("Alimetry", arr[5]);
                MessageBox.Show("Bye");
                Thread.Sleep(1000);
                try
                {
                    chart1.Series["Values"].Points.Clear();
                }
                catch (System.ArgumentException ex)
                { }
            }
           
        }

        private void Form1_Load(object sender, EventArgs e)
        {
       }

}
}