webdoorcreator/DemoServer/MainForm.cs

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

namespace DemoServer
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void btnPing_Click(object sender, EventArgs e)
        {
            var pingObj = new Ping();
            try
            {
                var pingTest = pingObj.Send(txtServAddr.Text.Trim());
                StringBuilder sb = new StringBuilder();
                sb.AppendLine("--- Test PING ---");
                sb.AppendLine($"ping res: {pingTest.Status}");
                sb.AppendLine("----------");
                sb.AppendLine("");
                lblOut.Text = sb.ToString();
            }
            catch
            { }
        }
    }
}