C# 멀티캐스트 소켓 생성

 protected Socket socket;   
 ...  

 void CreateMulticastSocket(string multicastIP, int port, bool exclusive)     
 {  
   sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);  
   
   socket.Blocking = false;  
   socket.ExclusiveAddressUse = exclusive;  
      
   if (!exclusive) socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);  
      
   IPEndPoint endpoint = new IPEndPoint(IPAddress.Any, port);  
   socket.Bind(endpoint);  
    
   IPAddress ip = IPAddress.Parse(multicastIP);  
   socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(ip, IPAddress.Any));          
 }