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C#

This code is a little progress to my previous question .. http://www.codeproject.com/Questions/448236/Monitoring-Network-Traffic

The problem is, I was not able to get the correct number of packets sent and received when the connection is established though my datacard (i.e. when I am connected to the internet usnig a modem)..

Kindly help me out..

Just like, in the network connections under control panel, the status shows so many info; how do I get it in my application?

using System;
using System.Runtime;
using System.Runtime.InteropServices;

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.Net;
using System.Net.NetworkInformation;

namespace NetworkTracer
{
    public partial class Tracer : Form
    {        
        private Timer _timer;
        private DateTime _startTime = DateTime.MinValue;
        private bool _isNetworkOnline;
        IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
        IPGlobalStatistics ipstat = null;
        Decimal start_r_packets;
        Decimal end_r_packets;

        public Tracer()
        {
            // check if connection exist or not

            InitializeComponent();

            btnMonitor.Enabled = true;
            btnCancel.Enabled = false;
            _timer = new Timer();           
            _timer.Tick += new EventHandler(timerTicker);
        }


        protected void startMonitor(object sender, EventArgs e)
        {
            _startTime = DateTime.Now;                        
            _timer.Start();                        
            btnMonitor.Enabled = false;
            btnCancel.Enabled = true;
            ipstat = properties.GetIPv4GlobalStatistics();

            getConnectionInfo();
        }

        [DllImport("wininet.dll")]
        private extern static bool InternetGetConnectedState(out int Description, int ReservedValue);
        public static bool IsConnectedToInternet()
        {
            int Desc;
            return InternetGetConnectedState(out Desc, 0);
        }

        protected void getConnectionInfo()
        {
            try
            {
                string myHost = System.Net.Dns.GetHostName();
                IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(myHost);
                IPAddress[] addr = ipEntry.AddressList;
                NetworkChange.NetworkAvailabilityChanged += new NetworkAvailabilityChangedEventHandler(NetworkChange_NetworkAvailabilityChanged);
                _isNetworkOnline = NetworkInterface.GetIsNetworkAvailable();

                if (addr.Length > 0)
                {
                    start_r_packets = Convert.ToDecimal(ipstat.ReceivedPackets);
                    start_r_packets = Math.Round(start_r_packets / 1048576 * 100000) / 100000;
                    //System.Net.NetworkInformation.
                    txtboxInfo.Text = "";
                    txtboxInfo.Text += "IP Address: " + addr[addr.Length - 1].ToString() + Environment.NewLine;
                    txtboxInfo.Text += Environment.NewLine + "Is Network Available: " + _isNetworkOnline.ToString() + Environment.NewLine;                    
                    txtboxInfo.Text += Environment.NewLine + "Starting Received Packets (in mb): " + start_r_packets.ToString() + Environment.NewLine;
                    txtboxInfo.Text += Environment.NewLine + "Is Network up: " + System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable().ToString() + Environment.NewLine;
                    txtboxInfo.Text += Environment.NewLine + "New method output: " + IsConnectedToInternet().ToString();
                }                                
                
            }
            catch (Exception ex)
            {
                txtboxInfo.Text = "Error!" + Environment.NewLine + ex.Message.ToString();
                _timer.Stop();
                lblTime.Text = "";
                btnCancel.Enabled = false;
                btnMonitor.Enabled = false;
            }
        }

        protected void NetworkChange_NetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e) 
        { 
            _isNetworkOnline = e.IsAvailable; 
        } 

        protected void closeEverything(object sender, EventArgs e)
        {
            _timer.Stop();
            btnCancel.Enabled = false;
            btnMonitor.Enabled = true;
            txtboxInfo.Text = lblTime.Text + Environment.NewLine;

            ipstat = properties.GetIPv4GlobalStatistics();
            end_r_packets = Convert.ToDecimal(ipstat.ReceivedPackets);
            end_r_packets = Math.Round(end_r_packets / 1048576 * 100000) / 100000;

            txtboxInfo.Text += Environment.NewLine + "Starting Received Packets (in mb): " + start_r_packets.ToString() + Environment.NewLine;
            txtboxInfo.Text += Environment.NewLine + "Ending Received Packets (in mb): " + end_r_packets.ToString() + Environment.NewLine;
            end_r_packets = end_r_packets - start_r_packets;
            txtboxInfo.Text += Environment.NewLine + "Total Received Packets (in mb): " + end_r_packets.ToString() + Environment.NewLine;

            writetoFile();
        }

        protected void writetoFile()
        {
            string path_file = @"C:\\Documents and Settings\\user\\Desktop\\Test Tracer.txt";
            string empty_line = "===============================================================";
            if (System.IO.File.Exists(path_file))
            {
                System.IO.File.AppendAllText(path_file, empty_line + Environment.NewLine + "Connection opened: " + _startTime + Environment.NewLine + "Connection Closed: " + DateTime.Now.ToString() + Environment.NewLine + Environment.NewLine + txtboxInfo.Text + Environment.NewLine);
            }
        }

        protected void timerTicker(object sender, EventArgs e)
        {
            var timeSinceStartTime = DateTime.Now - _startTime;
            timeSinceStartTime = new TimeSpan(timeSinceStartTime.Hours,
                                              timeSinceStartTime.Minutes,
                                              timeSinceStartTime.Seconds);                        
            lblTime.Text = "Time: " + timeSinceStartTime.ToString();
        }
    }
}