C# Ping IPAddress

using System.Net.NetworkInformation;
/// <summary>
/// ping the specified ip
/// </summary>
/// <param name="ipStr">ip address, "x.x.x.x"</param>
/// <returns>if connected, return true, otherwise return false</returns>
private bool Ping(string ipStr)
{
    Ping ping = new Ping();
    PingOptions options = new PingOptions();
    options.DontFragment = true;
    //测试数据  
    string data = "test data abcabc";
    byte[] buffer = Encoding.ASCII.GetBytes(data);
    //设置超时时间  
    int timeout = 120;
    //调用同步 send 方法发送数据,将返回结果保存至PingReply实例  
    PingReply reply = ping.Send(ipStr, timeout, buffer, options);
    if (reply.Status == IPStatus.Success) return true;
    else return false; 
}