Prompt Title: 生成唯一时间戳

以下是一个实现监控本地时间是否修改并同步网络时间的示例代码：

csharpCopy code
using System;
using System.Net;
using System.Runtime.InteropServices;
using System.Threading;

namespace TimeSyncExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建一个事件触发器
            TimeChangedEventTrigger eventTrigger = new TimeChangedEventTrigger();

            // 注册事件处理程序
            eventTrigger.TimeChanged += EventTrigger_TimeChanged;

            // 启动事件触发器
            eventTrigger.Start();

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey(true);
        }

        private static void EventTrigger_TimeChanged(object sender, EventArgs e)
        {
            Console.WriteLine("System time has been changed, syncing network time...");

            try
            {
                // 获取网络时间
                DateTime networkTime = GetNetworkTime();

                // 设置系统时间
                SetSystemTime(networkTime);

                Console.WriteLine("Network time has been synced successfully.");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Failed to sync network time: {ex.Message}");
            }
        }

        private static DateTime GetNetworkTime()
        {
            const string ntpServer = "pool.ntp.org";

            // NTP message size - 16 bytes of the digest (RFC 2030)
            byte[] ntpData = new byte[48];

            //Connect to the server (UDP)
            using (var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp))
            {
                socket.ReceiveTimeout = 3000;
                socket.SendTimeout = 3000;
                socket.Connect(IPAddress.Parse(ntpServer), 123);

                //Set protocol version
                ntpData[0] = 0x1B;

                //Send Request
                socket.Send(ntpData);

                //Receive Time
                socket.Receive(ntpData);

                //Offset to get to the "Transmit Timestamp" field (time at which the reply 
                //departed the server for the client, in 64-bit timestamp format."
                const byte serverReplyTime = 40;

                //Get the seconds part
                ulong intPart = BitConverter.ToUInt32(ntpData, serverReplyTime);

                //Get the seconds fraction
                ulong fractPart = BitConverter.ToUInt32(ntpData, serverReplyTime + 4);

                //Convert From big-endian to little-endian
                intPart = SwapEndianness(intPart);
                fractPart = SwapEndianness(fractPart);

                //Calculate the milliseconds part
                ulong milliseconds = (fractPart * 1000) / 0x100000000L;

                //Create a new DateTime object
                DateTime networkDateTime = new DateTime(1900, 1, 1, 0, 0, 0, DateTimeKind.Utc);
                networkDateTime = networkDateTime.AddSeconds(intPart);
                networkDateTime = networkDateTime.AddMilliseconds(milliseconds);

                return networkDateTime;
            }
        }

        private static void SetSystemTime(DateTime dateTime)
        {
            SYSTEMTIME st = new SYSTEMTIME();
            st.wYear = (ushort)dateTime.Year;
            st.wMonth = (ushort)dateTime.Month;
            st.wDay = (ushort)dateTime.Day;
            st.wHour = (ushort)dateTime.Hour;
            st.wMinute = (ushort)dateTime.Minute;
            st.wSecond = (ushort)dateTime.Second;
            st.wMilliseconds = (ushort)dateTime.Millisecond;

            SetSystemTime(ref st);
        }

        [DllImport("kernel32.dll", SetLastError = true)]
        private static extern bool SetSystemTime(ref SYSTEMTIME st);

        [DllImport("