using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Threading.Tasks;
using?System.Windows.Forms;

using?System.Net;
using?System.Net.Sockets;




namespace?WindowsFormsApplication28
{
????public?partial?class?Form1?:?Form
????{
????????

????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{
????????????
????????}
????????public?static?DateTime?GetNetworkTime（）
????????{
????????????//default?Windows?time?server
????????????const?string?ntpServer?=?“time.windows.com“;

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

????????????//Setting?the?Leap?Indicator?Version?Number?and?Mode?values
????????????ntpData[0]?=?0x1B;?//LI?=?0?（no?warning）?VN?=?3?（IPv4?only）?Mode?=?3?（Client?Mode）

????????????var?addresses?=?Dns.GetHostEntry（ntpServer）.AddressList;

????????????//The?UDP?port?number?assigned?to?NTP?is?123
????????????var?ipEndPoint?=?new?IPEndPoint（addresses[0]?123）;
????????????//NTP?uses?UDP
????????????var?socket?=?new?Socket（AddressFamily.InterNetwork?SocketType.Dgram?ProtocolType.Udp）;

????????????socket.Connect（ipEndPoint）;

????????????//Stops?code?hang?if?NTP?is?blocked
????????????socket.ReceiveTimeout?=?3000;

????????????socket.Send（ntpData）;
????????????socket.Receive（ntpData）;
????????????socket.Close（）;

????????????//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）;

????????????var?milliseconds?=?（intPart?*?1000）?+?（（fractPart?*?1000）?/?0x100000000L）;

????????????//**UTC**?time
????????????var?networkDateTime?=?（new?DateTime（1900?1?1?0?0?0?DateTimeKind.Utc））.AddMilliseconds（（long）milliseconds）;
???????????
????????????return?networkDateTime.ToLocalTime（）;
????????}

????????//?stackoverflow.com/a/3294698/162671
????????static?uint?SwapEndianness（ulong?x）
????????{
????????????return?（uint）（（（x?&?0x000000ff）?<???????????????????????????（（x?&?0x0000ff00）?<???????????????????????????（（x?&?0x00ff0000）?>>?8）?+
???????????????????????????（（x?&?0xff000000）?>>?24））;
???????????
????????}

????????private?void?timer1_Tick（object?sender?EventArgs?e）
????????{
????????????GetNetworkTime（）;
????????????label1.Text?=?GetNetworkT

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-04-04?22:05??標準時間\
?????目錄???????????0??2015-04-04?22:05??標準時間\WindowsFormsApplication28\
?????目錄???????????0??2015-04-04?22:05??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\
?????文件?????????187??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\App.config
?????文件????????2992??2015-04-04?22:01??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Form1.Designer.cs
?????文件????????3068??2015-04-04?22:01??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Form1.cs
?????文件????????6011??2015-04-04?22:01??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Form1.resx
?????文件?????????537??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Program.cs
?????目錄???????????0??2015-04-04?22:05??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Properties\
?????文件????????1374??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Properties\AssemblyInfo.cs
?????文件????????2902??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Properties\Resources.Designer.cs
?????文件????????5612??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Properties\Resources.resx
?????文件????????1112??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Properties\Settings.Designer.cs
?????文件?????????249??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\Properties\Settings.settings
?????文件????????3830??2015-04-04?21:21??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\WindowsFormsApplication28.csproj
?????目錄???????????0??2015-04-04?22:05??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\bin\
?????目錄???????????0??2015-04-04?22:05??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\bin\Debug\
?????文件????????9728??2015-04-04?22:01??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\bin\Debug\WindowsFormsApplication28.exe
?????文件?????????187??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\bin\Debug\WindowsFormsApplication28.exe.config
?????文件???????26112??2015-04-04?22:01??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\bin\Debug\WindowsFormsApplication28.pdb
?????文件???????23168??2015-04-04?22:04??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\bin\Debug\WindowsFormsApplication28.vshost.exe
?????文件?????????187??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\bin\Debug\WindowsFormsApplication28.vshost.exe.config
?????文件?????????490??2013-06-18?20:28??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\bin\Debug\WindowsFormsApplication28.vshost.exe.manifest
?????目錄???????????0??2015-04-04?22:05??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\obj\
?????目錄???????????0??2015-04-04?22:05??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\obj\Debug\
?????文件?????????865??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\obj\Debug\DesignTimeResolveAssemblyReferences.cache
?????文件????????7136??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????目錄???????????0??2015-04-07?15:10??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\obj\Debug\TempPE\
?????文件???????????0??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
?????文件???????????0??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
?????文件???????????0??2015-04-04?21:20??標準時間\WindowsFormsApplication28\WindowsFormsApplication28\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs
............此處省略9個文件信息