static void Main(string[] args)
{
  UdpClient client = null;
  string receiveString = null;
  byte[] receiveData = null;
  //實例化一個遠程端點，IP和端口可以隨意指定，等調用client.Receive(ref remotePoint)時會將該端點改成真正發(fā)送端端點
  IPEndPoint remotePoint = new IPEndPoint(IPAddress.Any, 0);
  
  while (true)
  {
 client = new UdpClient(11000);
 receiveData = client.Receive(ref remotePoint);//接收數(shù)據(jù)
 receiveString = Encoding.Default.GetString(receiveData);
 Console.WriteLine(receiveString);
 client.Close();//關閉連接
  }
}
客戶端代碼如下：
 
static void Main(string[] args)
{
  string sendString = null;//要發(fā)送的字符串
  byte[] sendData = null;//要發(fā)送的字節(jié)數(shù)組
  UdpClient client = null;
  
  IPAddress remoteIP = IPAddress.Parse("127.0.0.1");
  int remotePort = 11000;
  IPEndPoint remotePoint = new IPEndPoint(remoteIP, remotePort);//實例化一個遠程端點
  
  while (true)
  {
 sendString = Console.ReadLine();
 sendData = Encoding.Default.GetBytes(sendString);
  
 client = new UdpClient();
 client.Send(sendData, sendData.Length, remotePoint);//將數(shù)據(jù)發(fā)送到遠程端點
 client.Close();//關閉連接
  }