c#实现ping

using System.Net.NetworkInformation;
using System.Text;

public static int PingHost(string ipStr)
{
    Ping pingSender = new Ping();
    PingOptions options = new PingOptions();
    options.DontFragment = true;
    string data = "a";
    byte[] buffer = Encoding.ASCII.GetBytes(data);
    int timeout = 1000;
    try
    {
        PingReply reply = pingSender.Send(ipStr, timeout, buffer, options);
        if (reply.Status == IPStatus.Success)
        {
            return 0;
        }

    }
    catch { }
    return 1;
}