arduinovoltmeterc#bit

public partial class MainWindow : Window
    {
        SerialPort mainport = new SerialPort();
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (!mainport.IsOpen)
            {
                try
                {
                    mainport.PortName = COMPortList.SelectedItem.ToString();
                    mainport.BaudRate = 115200;
                    mainport.DataBits = 8;
                    mainport.StopBits = StopBits.One;
                    mainport.Parity = Parity.None;
                }
                catch (Exception owo) { MessageBox.Show(owo.Message); }
                try
                {
                    //Connect
                    mainport.Open();
                    ((Button)e.Source).Content = "Disconnect";
                    StartReceivingData();
                }
                catch (Exception owo) { MessageBox.Show(owo.Message); }
            }
            else
            {
                try
                {
                    Task.WhenAll(tasks);
                    mainport.Close();
                    ((Button)e.Source).Content = "Connect";
                }
                catch (Exception owo) { MessageBox.Show(owo.Message); }
            }
        }

        private List<Task> tasks = new List<Task>();

        private void StartReceivingData()
        {
            tasks.Add(startListening());
        }
        private async Task startListening()
        {

            try
            {
                await Task.Factory.StartNew(() =>
                {
                    while (mainport.IsOpen)
                    {
                        try
                        {

                            string message = mainport.ReadLine();
                            Application.Current.Dispatcher.BeginInvoke(new Action(() => { Voltage.Content = message; }));

                        }
                        catch (TimeoutException)
                        {
                            //There will be a timeout/Operation timed out exception going mental here so nothing is really needed here...
                        }
                        catch (IOException owo) { MessageBox.Show(owo.Message); }
                        catch (Exception owo) { MessageBox.Show(owo.Message); }
                    }
                });
            }
            catch { }
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            foreach(string comPort in SerialPort.GetPortNames())
            {
                COMPortList.Items.Add(comPort);
            }
        }
    }