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public class Person
     {
         private string _name = null;
         private int _age = 0;
         public Person(string name, int age)//¸¸ÀàµÄ¹¹Ôì·½·¨
         {
             this._name = name;//»ñµÃ²ÎÊýµÄÖµ
             this._age = age;
             Console.WriteLine("ÄúµÄÐÕÃûÊÇ{0},ÄúµÄÄêÁäÊÇ{1}.",
             this._name, this._age);
         }
     }
     public class Studnet : Person
     {
       private int _id;
         public Studnet(string name, int age, int IDCard):base(name,age)
         //×ÓÀ๹Ôì·½·¨¼Ì³Ð¸¸À๹Ôì·½
         //°Ñ½ÓÊܵ½µÄname¡¢ageÁ½¸ö²ÎÊý½»¸ø¸¸ÀàµÄ¹¹Ôì·½·¨È¥´¦Àí
     {
         this._id = IDCard;
       Console.WriteLine("ÄúµÄÉí·ÝÖ¤ºÅÂëΪ{0}",this._id);
     }
     }
class Program
     {
         static void Main(string[] args)//Ö÷º¯Êý
      &n


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using System;
using System.Collections.Generic; ......

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c#ºÍUDP SOCKET¹ã²¥

server:
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram,ProtocolType.Udp);
IPEndPoint iep1 = new IPEndPoint(IPAddress.Broadcast, 9050);//255.255.255.255
IPEndPoint iep2 = new IPEndPoint(IPAddress.Parse("192.168.1.255"), 9050);
......
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