using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Threading.Tasks;
using?System.Net.Sockets;
using?System.Net;
using?System.Threading;
namespace?UDP_Server
{
????class?Program
????{
????????static?Socket?server;
????????static?void?Main（string[]?args）
????????{
????????????server?=?new?Socket（AddressFamily.InterNetwork?SocketType.Dgram?ProtocolType.Udp）;
????????????server.Bind（new?IPEndPoint（IPAddress.Parse（“127.0.0.1“）?2000））;//綁定端口號和IP
????????????Console.WriteLine（“服務端已經開啟“）;
????????????Thread?t?=?new?Thread（ReciveMsg）;//開啟接收消息線程
????????????t.Start（）;
????????????Thread?t2?=?new?Thread（sendMsg）;//開啟發送消息線程
????????????t2.Start（）;
????????}
????????///?

????????///?向特定ip的主機的端口發送數據報
????????///?

????????static?void?sendMsg（）
????????{
????????????EndPoint?point?=?new?IPEndPoint（IPAddress.Parse（“127.0.0.1“）?2000）;
????????????while?（true）
????????????{
????????????????string?msg?=?Console.ReadLine（）;
????????????????server.SendTo（Encoding.UTF8.GetBytes（msg）?point）;
????????????}
????????}
????????///?

????????///?接收發送給本機ip對應端口號的數據報
????????///?

????????static?void?ReciveMsg（）
????????{
????????????while?（true）
????????????{
????????????????EndPoint?point?=?new?IPEndPoint（IPAddress.Any?0）;//用來保存發送方的ip和端口號
????????????????byte[]?buffer?=?new?byte[1024];
????????????????int?length?=?server.ReceiveFrom（buffer?ref?point）;//接收數據報
????????????????string?message?=?Encoding.UTF8.GetString（buffer?0?length）;
????????????????Console.WriteLine（point.ToString（）?+?message）;

????????????}
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????187??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\App.config

?????文件???????5632??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1\bin\Debug\ConsoleApplication1.exe

?????文件????????187??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\bin\Debug\ConsoleApplication1.exe.config

?????文件??????13824??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1\bin\Debug\ConsoleApplication1.pdb

?????文件??????24224??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1\bin\Debug\ConsoleApplication1.vshost.exe

?????文件????????187??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\bin\Debug\ConsoleApplication1.vshost.exe.config

?????文件????????490??2019-03-19?12:46??ConsoleApplication1\ConsoleApplication1\bin\Debug\ConsoleApplication1.vshost.exe.manifest

?????文件???????2580??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\ConsoleApplication1.csproj

?????文件????????688??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1\obj\Debug\ConsoleApplication1.csproj.FileListAbsolute.txt

?????文件???????1755??2020-12-11?21:13??ConsoleApplication1\ConsoleApplication1\obj\Debug\ConsoleApplication1.csprojResolveAssemblyReference.cache

?????文件???????5632??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1\obj\Debug\ConsoleApplication1.exe

?????文件??????13824??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1\obj\Debug\ConsoleApplication1.pdb

?????文件????????725??2020-12-11?21:27??ConsoleApplication1\ConsoleApplication1\obj\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????6658??2020-12-11?19:10??ConsoleApplication1\ConsoleApplication1\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件??????????0??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs

?????文件??????????0??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs

?????文件??????????0??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs

?????文件???????1820??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1\Program.cs

?????文件???????1362??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\Properties\AssemblyInfo.cs

?????文件???????1026??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1.sln

????..A..H.?????30720??2020-12-11?21:37??ConsoleApplication1\ConsoleApplication1.v12.suo

?????目錄??????????0??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\obj\Debug\TempPE

?????目錄??????????0??2020-12-11?21:13??ConsoleApplication1\ConsoleApplication1\bin\Debug

?????目錄??????????0??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1\obj\Debug

?????目錄??????????0??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\bin

?????目錄??????????0??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\obj

?????目錄??????????0??2020-12-11?14:37??ConsoleApplication1\ConsoleApplication1\Properties

?????目錄??????????0??2020-12-11?22:49??ConsoleApplication1\ConsoleApplication1

?????目錄??????????0??2020-12-11?14:37??ConsoleApplication1

-----------?---------??----------?-----??----

............此處省略2個文件信息