如何在.NET C#中以编程方式确定IP是否来自同一LAN

using System;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;

public class SameLANChecker
{
    public static bool IsSameLAN(IPAddress ip1, IPAddress ip2)
    {
        // 获取本地计算机的IP地址和子网掩码
        IPInterfaceProperties properties = NetworkInterface.GetAllNetworkInterfaces()[0].GetIPProperties();
        IPAddress localIP = properties.UnicastAddresses[0].Address;
        IPAddress subnetMask = properties.UnicastAddresses[0].IPv4Mask;

        // 计算网络标识符
        byte[] localIPBytes = localIP.GetAddressBytes();
        byte[] subnetMaskBytes = subnetMask.GetAddressBytes();
        byte[] networkIdentifier1 = new byte[localIPBytes.Length];
        byte[] networkIdentifier2 = new byte[localIPBytes.Length];

        for (int i = 0; i< localIPBytes.Length; i++)
        {
            networkIdentifier1[i] = (byte)(localIPBytes[i] & subnetMaskBytes[i]);
            networkIdentifier2[i] = (byte)(ip2.GetAddressBytes()[i] & subnetMaskBytes[i]);
        }

        // 比较网络标识符
        return networkIdentifier1.Equals(networkIdentifier2);
    }

    public static void Main()
    {
        IPAddress ip1 = IPAddress.Parse("192.168.1.10");
        IPAddress ip2 = IPAddress.Parse("192.168.1.11");

        if (IsSameLAN(ip1, ip2))
        {
            Console.WriteLine("IP地址在同一LAN上");
        }
        else
        {
            Console.WriteLine("IP地址不在同一LAN上");
        }
    }
}