Network Logging C#

using System;
using System.IO;
using System.Net.NetworkInformation;
using System.Threading;

namespace Network_Uptime_Logging
{
    class Program
    {
        static DateTime change = DateTime.Now;
        static bool up = true;
        static bool wasUp = true;

        static void Main(string[] args)
        {
            new StreamWriter("c:\\netup.txt", true).WriteLine(change.ToString() + ":\t" + ((up) ? "System Up" : "System Down"));
            new System.Media.SoundPlayer("c:\\windows\\media\\Speech " + (up ? "On" : "Off") + ".wav").Play();
            while (true)
            {
                int pingTime = 0;
                ConnectedDelegate dlgt = new ConnectedDelegate(IsConnectedToCharterDNS);
                pingTime = dlgt();
                Console.Write(pingTime + ",");
                Thread.Sleep(TimeSpan.FromSeconds(5));
            }
        }

        delegate int ConnectedDelegate();

        public static int IsConnectedToCharterDNS()
        {
            string CharterDNS = "68.113.206.10";
            int result = 0;
            try
            {
                PingReply reply = new Ping().Send(CharterDNS);
                if (reply.Status == IPStatus.Success)
                    result = (int)reply.RoundtripTime;
            }
            catch { }
            Log(DateTime.Now, result);
            return result;
        }

        public static void Log(DateTime time, int pingTime)
        {
            up = pingTime == 0 ? false : true;
            if (up != wasUp && change < DateTime.Now.AddMinutes(-1))
            {
                change = DateTime.Now;
                wasUp = up;
                new StreamWriter("c:\\netup.txt", true).WriteLine(change.ToString() + ":\t" + ((up) ? "System Up" : "System Down"));
                new System.Media.SoundPlayer("c:\\windows\\media\\Speech " + (up ? "On" : "Off") + ".wav").Play();
            }
            new StreamWriter("c:\\netup.csv",true).Write(time.ToString() + "," + pingTime.ToString() + Environment.NewLine);
        }
    }
}