UDP отправка на закрытый сокет (ERROR)

foreach (var clientData in DataList)
                {
                    clientData.Value.Socket.SendTo(data1, clientData.Value.EndPoint);
                }

socket.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref epSender, new AsyncCallback(ReceiveCallback), epSender);

private static IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Any, portReceive);
        private EndPoint endPoint = (EndPoint)ipEndPoint;
 
 
 
        public void Start()
        {
 
            socket = new Socket(AddressFamily.InterNetwork,
                    SocketType.Dgram, ProtocolType.Udp);
 
          
            IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Any, 28015);
 
            
            socket.Bind(ipEndPoint);
 
            IPEndPoint ipeSender = new IPEndPoint(IPAddress.Any, 0);
          
            EndPoint epSender = (EndPoint)ipeSender;
 
            socket.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref epSender, new AsyncCallback(ReceiveCallback), socket);
 
           
        }

socket.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref epSender, new AsyncCallback(ReceiveCallback), socket);

foreach (var clientData in DataList)
                {
                    clientData.Value.Socket.SendTo(data1, clientData.Value.EndPoint);
                }

if (DataList.Count > 1)
                    foreach (var clientData in DataList)
                    {                       
                        clientData.Value.Socket.SendTo(data1, clientData.Value.EndPoint);                   
                    }

socket.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref epSender, new AsyncCallback(ReceiveCallback), socket);

 
static bool IsSocketConnected(Socket s)
    {
        return !((s.Poll(1000, SelectMode.SelectRead) && (s.Available == 0)) || !s.Connected);
    }