Estoy usando este código, pero cuando detengo el proceso no obtengo las estadísticas de ping:

System.Diagnostics.Process p = new System.Diagnostics.Process();
p.StartInfo.FileName = "ping";
p.StartInfo.Arguments = "-c " + count + " -i " + interval + " -s " + buffer + " -W " + timeout + " " + address;
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardOutput = true;

string readData = "";

DateTime dt = DateTime.Now.AddSeconds(5);
if (p.Start())
{
    Scanner scanner = new Scanner(p.StandardOutput.BaseStream);

    while (scanner.HasNextLine)
    {
        readData =  scanner.NextLine().ToString();
        Console.WriteLine(readData.ToString());

        if (!string.IsNullOrEmpty(readData) && !readData.StartsWith("---"))
        {
            Match M = Regex.Match(readData, @"^[\d]+ bytes from ([^:]+): [^ ]+ ttl=([\d]+) time=([^ ]+) ms");

            if (M != null && M.Success)
            {
                string IP = M.Groups[1].Value;
                string TTL = M.Groups[2].Value;
                string timeStr = M.Groups[3].Value;

                Console.WriteLine(String.Format("Ping to {0} took {2} ms with a ttl of {1}", IP, TTL, timeStr));
                // Parsing the timeStr will work the same way as above
               if(dt > DateTime.Now)
               {
                   p.StandartInput.Write("\x3");
                }
            }
            else
            {
                Match M1 = Regex.Match(readData, @"^rtt [^0-9]*([\d][^\/]+)\/([^\/]+)\/([^\/]+)\/([^ ]+) ms$");

                if (M1 != null && M1.Success)
                {
                    float avgPingTime = 0;
                    float maxPingTime = 0;
                    float minPingTime = 0;

                    string minPingString = M1.Groups[1].Value;
                    string avgPingString = M1.Groups[2].Value;
                    string maxPingString = M1.Groups[3].Value;

                    // Now parse that value
                    float.TryParse(minPingString, System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.InvariantInfo, out minPingTime);
                    float.TryParse(avgPingString, System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.InvariantInfo, out avgPingTime);
                    float.TryParse(maxPingString, System.Globalization.NumberStyles.Float, System.Globalization.NumberFormatInfo.InvariantInfo, out maxPingTime);

                    Console.WriteLine(String.Format("Min Time : {0} , AVG {2} ms, Max Time {1}", minPingTime, maxPingTime, avgPingTime));
                }
            }
        }
    }
}

Sin uso

if(dt > DateTime.Now)
{
     p.StandartInput.Write("\x3");
}

el resultado se muestra así:

64 bytes from 8.8.8.8: icmp_req=1 ttl=46 time=13.9 ms
64 bytes from 8.8.8.8: icmp_req=2 ttl=46 time=13.9 ms
64 bytes from 8.8.8.8: icmp_req=3 ttl=46 time=13.9 ms

--- 8.8.8.8 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 3016ms
rtt min/avg/max/mdev = 13.910/13.926/13.951/0.010 ms

pero si detengo elping utilizandop.StandartInput.Write("\x3"); nunca va alstatistics parte se cuelga ensecuencia 1 : 64 bytes from 8.8.8.8: icmp_req=1 ttl=46 time=13.9 ms y no sigas leyendo, cómo mostrar elstatistics después de detener elping proceso?

en otras palabras, mi problema es cuando el usuario quiere detener elping debería mostrar elstatistics por el cierto tiempo que se usó para hacer ping ...

ACTUALIZAR

He implementadop.StandartInput.Write("/x3"); e interrumpe el proceso de ping pero no muestra las estadísticas y simplemente se cuelga allí.