Why Ping timeout is not working correctly?

Question

I have 5 pc and i want to ping this pc\'s are available or no. So I\'m using c# Ping class. Two pc are available but the other 3 pc are closed when i ping them my program wa

Answer 1

Pinging to IP Address like 8.8.8.8 worked absolutely fine, but when pinging to dns address like www.google.com give random time outs.
i think these random time outs relates to dns resolution nothing to do with ping time outs

    private static bool DoPing()
    {
        try
        {
            using (System.Net.NetworkInformation.Ping ping = new Ping())
            {

                PingReply result = ping.Send("8.8.8.8", 500, new byte[32], new PingOptions { DontFragment = true, Ttl = 32 });

                if (result.Status == IPStatus.Success)
                    return true;
                return false;
            }
        }
        catch
        {
            return false;
        }
    }