How to Perform Multiple “Pings” in Parallel using C#

Question

I am trying to calculate the average round-trip time for a collection of servers. In order to speed things up, I would like to perform the pings in parallel. I have writte

Answer 1

use the Parallel.For and a ConcurrentBag

    static void Main(string[] args)
    {
        Console.WriteLine(AverageRoundTripTime("www.google.com", 100));
        Console.WriteLine(AverageRoundTripTime("www.stackoverflow.com", 100));
        Console.ReadKey();
    }

    static double AverageRoundTripTime(string host, int sampleSize)
    {
        ConcurrentBag values = new ConcurrentBag();
        Parallel.For(1, sampleSize, (x, y) => values.Add(Ping(host)));
        return values.Sum(x => x) / sampleSize;
    }
    static double Ping(string host)
    {
        var reply = new Ping().Send(host);
        if (reply != null)
            return reply.RoundtripTime;
        throw new Exception("denied");
    }