How to make permanent output of messages?

Question

Android

I accept messages, I want them to be constantly displayed in a list, for example, how best to do this?
For example, I just tried to display one in textview, but it does not display, although it works fine in winforms.

public class MainActivity : Activity
{
    public string mess;
 
    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);
 
        // Set our view from the "main" layout resource
        SetContentView (Resource.Layout.Main);
        StartListening ();
 
 
        Button bt = FindViewById<Button>(Resource.Id.button1);
        bt.Click += delegate { start();};
        // Get our button from the layout resource,
        // and attach an event to it
        }
    public void start()
    {
        TextView text = FindViewById<TextView> (Resource.Id.textView1);
 
 
        StartListening();
        text.Text = mess;
        //text.SetText (mess);
    }
    private readonly UdpClient udp = new UdpClient(45000);
 
    public void StartListening()
    {
        this.udp.BeginReceive(Receive, new object());
 
 
 
 
    }
    public void Receive(IAsyncResult ar)
    {
        IPEndPoint ip = new IPEndPoint(IPAddress.Any, 45000);
        byte[] bytes = udp.EndReceive(ar, ref ip);
 
 
        mess = Encoding.ASCII.GetString(bytes);
        StartListening();
 
    }
}
    }

Answer 1

if you believe the code "output" it will only if you poke the button continuously and then only the last data from the variable that is constantly overwritten. The implementation of the idea is clearly incorrect, what exactly was planned to be done?