C#/Visual Studio Express/Windows Form/Graphing Serial Port?

chart1->Series["current temperature"]->Points->AddXY(plottime[index], plotTemperature[index]);

chart1.Series["Age"].Points.AddXY("Max",25);

// data received from serial port
private: System::Void serialPort1_DataReceived(System::Object^  sender, System::IO::Ports::SerialDataReceivedEventArgs^  e) {
		static int time=0;
		int data;
		while(serialPort1->BytesToRead)
			{
			int data=serialPort1->ReadByte();
			cout << "data " << data << endl;
			chart1.Series["Age"].Points.AddXY(time++, data);
			}
		 }

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;
using System.IO;
//using System.Windows.Forms.DataVisualization.Charting;

namespace Serial_receive
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string[] ports = SerialPort.GetPortNames();
                        foreach (string port in ports)
                        {
                            comboBox1.Items.Add(port);
                        }
        }
        //
        string t;
        private void button2_Click(object sender, EventArgs e)
        {
           

            t = comboBox1.Text.ToString();

            sErial(t);

        }
        //method
                SerialPort sp;
                void sErial(string Port_name)
                {
                    sp = new SerialPort(Port_name, 9600, Parity.None, 8, StopBits.One);
                    sp.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
                    sp.Open();
                }
        //
                 void DataReceivedHandler(object sender,SerialDataReceivedEventArgs e)
                {
                    SerialPort sp = (SerialPort)sender;

                    string w = sp.ReadLine();
                    
                    string FolderName = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);   //set destination as your desktop
                    using (StreamWriter SW = new StreamWriter(FolderName + "\\test.txt", true))   //true makes it append to the file instead of overwrite
                    {
                        SW.WriteLine(w);
                        SW.Close();
                    }
                    //string msg = sp.ReadExisting();
                    if (w != String.Empty)
                    {
                        Invoke(new Action(() => richTextBox1.AppendText(w)));
                    }

                }
          }
    }

Invoke(new Action(() => richTextBox1.AppendText(w)));

string w = sp.ReadLine();
Int32 number;
bool result = Int32::TryParse(w, number);
chart1.Series["Age"].Points.AddXY(time++, number);

string w = sp.ReadLine();
Int32 number;
bool result = Int32::TryParse(w, number);
chart1.Series["Age"].Points.AddXY(time++, number);

string w = sp.ReadLine();
int time=0;
Int32 number;
bool result = Int32.TryParse(w, out number);
chart1.Series["Age"].Points.AddXY(time++, number);

using System.Windows.Forms.DataVisualization.Charting;

this.chart1.SaveImage("C:\\Users\\johnjames\\Desktop\\mychart.png", ChartImageFormat.Png);

private: System::Void chartButton_Click(System::Object^  sender, System::EventArgs^  e) {
			 chart1->SaveImage("C:\\temp\\mychart.png", ChartImageFormat::Png);
		 }

private void button3_Click(object sender, EventArgs e)
                 {
                     sp.Close();
                     this.chart1.SaveImage("C:\\temp\\mychart.png", ChartImageFormat.Png);
                 }

#include <REG51.H>                /* special function register declarations   */ 
#include <stdio.h>                /* prototype declarations for I/O functions */   
void serial_init(void); 
//------------------------------------------------- 
//Setup the serial port for 9600 baud at 11.0592MHz. 
//------------------------------------------------- 
void serial_init(void) 
{     
SCON  = 0x50;                         /* SCON: mode 1, 8-bit UART, enable rcvr         */     
TMOD |= 0x20;               /* TMOD: timer 1, mode 2, 8-bit reload                    */     
TH1   = 0xFD;               /* TH1:  reload value for 9600 baud @ 11.0592MHz*/    
TR1   = 1;                  /* TR1:  timer 1 run                               */     
TI    = 1;                  /* TI:   set TI to send first char of UART           */ 
}  

unsigned char sec,sec100;
unsigned int bt,tick,r,bpm;
void msdelay(unsigned int);

void extrint (void) interrupt 0 // external Interrupt to detect the heart pulse
{
bt=tick; // number of ticks are picked
tick=0; // reset for next counting
}
void timer0 (void) interrupt 1 using 1 // Timer 0 for one second time
{
TH0 = 0xdc; //The value is taken for Ssc/100 at crystal 11.0592MHz
sec100++; // It is incremented every Ssc/100 at crystal 11.0592MHz
tick++; // This variable counts the time period of incoming pulse in Sec/100
if(tick>=3500){tick=0;} // tick are limited to less trhan 255 for valid calculation
if(sec100 >=100) // 1 sec = sec100 * 100
{
sec++;
sec100=0;
}
}
void main()
{
serial_init(); 
P0=0xff;
P1=0xff;
P2=0xff;
P3=0xff;

EA = 1;
TMOD = 0x21;
IT0 = 1;
EX0 = 1;
ET0 = 1;
TR0 = 1;
msdelay(1000);

msdelay(1000);
printf("Heart beat ");
msdelay(1500);
msdelay(500);
//delay(15000);
bpm=0;bt=0;
while(1)
{
if(sec >=1)
{
sec=0;
/*
The sampling time is fixed 1 sec.
A variable "tick" is incremented with one tick per 100mSc in the timer 0 interrupt routine.
Each on occurring of external interrupt the value in the "tick" is picked up
and it is set to zero for recounting.
The process continues till next external interrupt.
Formula for calculating beats per minutes (microcontroller based heartbeat monitor ) is
as tick is the time period in Sec/100. so extract the frequency of pulses at external interrupt
Frequency = (1/tick)* 100 i.e pulses /sec
Then
bpm = frequency * 60 for one minutes i.e pulses per minute
in short we can do it as
bpm = 6000/ bt
*/

if(bt >=7){
bpm = 6000/bt; // for valid output bt is limited so that it should be greater than 6
msdelay(500);
//printf("Pulse. ");
r=bpm%100;
//printf("bpm: %d\r\n", bpm);
printf(" %d\r\n", bpm);	
}
else {
printf("out of range");} // otherwise bpm will be shown zero
}
}
}

void msdelay(unsigned int i)
{
//unsigned int i;
while(i --);
}