Send索引超出了数组界限

public static void Main(string[] args)
{
Ping pingSender = new Ping();
PingOptions options = new PingOptions();
options.DontFragment = true;
string data = "192.168.11.100";
byte[] buffer = Encoding.ASCII.GetBytes(data);
int timeout = 1000;
PingReply reply = pingSender.Send(args[0], timeout, buffer, options);
if (reply.Status == IPStatus.Success)
{
Console.WriteLine("Address: {0}", reply.Address.ToString());
Console.WriteLine("RoundTrip time: {0}", reply.RoundtripTime);
Console.WriteLine("Time to live: {0}", reply.Options.Ttl);
Console.WriteLine("Don't fragment: {0}", reply.Options.DontFragment);
Console.WriteLine("Buffer size: {0}", reply.Buffer.Length);
}
我找了许久也没找到是哪里，跪求大神解疑一下呗~