如何使用SharpPcap从TCPPacket获取数据？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SharpPcap;
using SharpPcap.LibPcap;
using SharpPcap.Packets;

ICaptureDevice device = null;
var devices = LibPcapLiveDeviceList.Instance;
foreach (var dev in devices)
{
    Console.WriteLine("Device: " + dev.Name);
    if (dev.Name == "Your_Device_Name")
    {
        device = dev;
        break;
    }
}
if (device == null)
{
    Console.WriteLine("No device found.");
    return;
}

device.Open();
device.Filter = "tcp";

device.OnPacketArrival += new PacketArrivalEventHandler(device_OnPacketArrival);
device.StartCapture();

// ...

static void device_OnPacketArrival(object sender, CaptureEventArgs e)
{
    var packet = Packet.ParsePacket(e.Packet.LinkLayerType, e.Packet.Data);
    var tcpPacket = packet.Extract<TcpPacket>();

    if (tcpPacket != null)
    {
        // 提取数据
        Console.WriteLine("TCP Packet: " + tcpPacket.ToString());
    }
}

device.StopCapture();
device.Close();