Application freezes when receiving UDP broadcasts

See more:

C#

Im trying to receive UDP Broadcasts IN A LAN
This is my code:

private void timer1_Tick(object sender, EventArgs e)
        {
            EndPoint iep = new IPEndPoint(IPAddress.Any, 0);
            Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            
            IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, 11000);
            listener.Bind(localEndPoint);
            EndPoint ep = (EndPoint)iep;
            this.Text = "Ready to receive…";
            byte[] data = new byte[1024];
            int recv = listener.ReceiveFrom(data, ref ep);
            string stringData = Encoding.ASCII.GetString(data, 0, recv);
            
            listBox1.Items.Add(stringData);
            listener.Close();
        }

Now what happens is due to the Timer, my application freezes
though it receives the broadcasts and adds the data to the list box.
Is there any way that i can make sure that the UDP broadcasts are still received, at the same time doesn't freeze the application?