Леонид

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Net.NetworkInformation;

namespace AOConfig
{
    public partial class MassScript : Form
    {
        
        public MassScript()
        {
            InitializeComponent();
        }

        private void OpenFileBtn_Click(object sender, EventArgs e)
        {
            SourceList.Items.Clear();
            using (OpenFileDialog ofd = new OpenFileDialog() { Filter = "Text Documents(*.txt)|*.txt", ValidateNames = true, Multiselect = false })
            {
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    string[] switchList = System.IO.File.ReadAllLines(ofd.FileName,Encoding.UTF8);
                    SourceList.Items.AddRange(switchList);
                    TotalCount_label.Text = SourceList.Items.Count.ToString();
                }
            }
        }

        private void StartPingBtn_Click(object sender, EventArgs e)
        {
            Ping switchPing = new Ping();
            PingReply pingReply = null;
            PingOptions options = new PingOptions();
            options.DontFragment = true;
            // options.Ttl = 64;
            int timeout = 1000;
            foreach (var Item in SourceList.Items)
            {
                string Host = SourceList.GetItemText(Item);
                byte[] buffer = Encoding.ASCII.GetBytes(Host);
                pingReply = switchPing.Send(Host, timeout, buffer, options);

                if (pingReply.Status == IPStatus.Success)
                {
                    LiveList.Items.Add(Host);
                    LiveCount_label.Text = LiveList.Items.Count.ToString();
                }
                else
                {
                    continue;
                }
            }
        }
    }
}

private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            dataIN = serialPort1.ReadExisting();
            this.Invoke(new EventHandler(ShowData));
        }

        private void ShowData(object sender, EventArgs e)
        {
            richTextBox1.Text += dataIN;
        }
    }
}