ping

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.Net;
using System.Net.NetworkInformation;
using System.IO;
using System.Collections;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        Ping pingSender = new Ping();
        IPAddress myself;
        int Req_num = 0;
        int Rec_num = 0;
        int nRec_num = 0;

        public Form1()
        {
            InitializeComponent();
            textBox3.BackColor = Color.White;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            IPHostEntry ihe = Dns.GetHostByName(textBox1.Text);
            myself = ihe.AddressList[0];
            timer1.Start();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {

            P_component();
        }
        void P_component()
        {
            string data = RandomString(int.Parse(numericUpDown1.Value.ToString()));
            byte[] buffer = Encoding.ASCII.GetBytes(data);
            int timeout = 1200;
            PingReply reply = pingSender.Send(myself, timeout, buffer);
            if (reply.RoundtripTime != 0)
            {
                textBox3.AppendText("[" + DateTime.Now.ToString("HH:mm:ss") + "] " + myself.ToString() + " " + reply.RoundtripTime.ToString() + " ms \r\n");
                Req_num++;
                req_num.Text = Req_num.ToString();
                Rec_num++;
                rec_num.Text = Rec_num.ToString();
            }
            else
            {
                textBox3.AppendText("[" + DateTime.Now.ToString("HH:mm:ss") + "] " + myself.ToString() + " is not responding \r\n");
                Req_num++;
                req_num.Text = Req_num.ToString();
                nRec_num++;
                nrec_num.Text = nRec_num.ToString();
            }

        }

        private void button2_Click(object sender, EventArgs e)
        {
            timer1.Stop();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (checkBox1.Checked)
            {
                if (File.Exists("Logs"))
                    saveLog();
                else
                {
                    logs_Create();
                    saveLog();
                }
            }

            textBox3.Clear();
            Req_num = 0;
            req_num.Text = "0";
            Rec_num = 0;
            rec_num.Text = "0";
            nRec_num = 0;
            nrec_num.Text = "0";


        }
        private string RandomString(int size)
        {
            StringBuilder builder = new StringBuilder();
            Random random = new Random();
            char ch;
            for (int i = 0; i < size; i++)
            {
                ch = Convert.ToChar(Convert.ToInt32(Math.Floor(26 * random.NextDouble() + 65)));
                builder.Append(ch);
            }

            return builder.ToString();
        }
        private void saveLog()
        {


            string filename = "Logs\\" + DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss") + ".log";
            System.IO.StreamWriter file = new System.IO.StreamWriter(filename);
            file.WriteLine("Log was saved at: " + DateTime.Now.ToString("yyyy.MM.dd HH:mm:ss dddd"));
            file.WriteLine("Domain: " + textBox1.Text);
            file.WriteLine("IP: " + myself.ToString());
            file.WriteLine("Ping with " + numericUpDown1.Value.ToString() + " bytes");
            file.WriteLine("Requests sent: " + Req_num.ToString());
            file.WriteLine("Answer received: " + Rec_num.ToString());
            file.WriteLine("Answer not received: " + nRec_num.ToString());
            file.WriteLine(textBox3.Text);
            file.Close();
        }
        private void logs_Create()
        {

            Directory.CreateDirectory("Logs");

        }

    }
}