Добавить PortScanner/TCPChecker.cs

Я восхищаюсь Kolo. Вот с таких людей надо брать пример

PortScanner/TCPChecker.cs

@@ -0,0 +1,46 @@
+using System.Net;
+using System.Net.Sockets;
+
+namespace IP_port_checker.PortScanner
+{
+    public class TCPChecker
+    {
+        private static async Task<bool> IsPortOpen(IPAddress ip, int port)
+        {
+            try
+            {
+                using var tcp = new TcpClient();
+                var task = tcp.ConnectAsync(ip, port);
+                var timeout = Task.Delay(500);
+                if (await Task.WhenAny(task, timeout) == task)
+                {
+                    return true;
+                }
+                return false;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        public static async Task ScanPort(IPAddress ip, int stport, int endport)
+        {
+            var tasks = new List<Task<bool>>();
+
+            for (int port = stport; port <= endport; port++)
+            {
+                tasks.Add(IsPortOpen(ip, port));
+            }
+
+            bool[] res = await Task.WhenAll(tasks);
+
+            for (int i = 0; i < res.Length; i++)
+                if (res[i])
+                    Console.WriteLine($"[{DateTime.Now:HH:mm.ss.ffff}] Порт {stport + i} открыт");
+
+            Console.WriteLine();
+        }
+    }
+}
+//127.0.0.1