Try to improve GetFreePort method

Author: DYH1319

src/ElectronNET.API/Runtime/Helpers/PortHelper.cs

@@ -2,24 +2,89 @@
 {
     using System.Linq;
     using System.Net.NetworkInformation;
+    using System.Collections.Generic;
+    using System.Net;
+    using System.Net.Sockets;
 
     internal static class PortHelper
     {
         public static int GetFreePort(int? defaultPost)
         {
             var listeners = IPGlobalProperties.GetIPGlobalProperties().GetActiveTcpListeners().Select(e => e.Port).ToList();
+            var localAddresses = GetLocalAddresses();
 
             int port = defaultPost ?? 8000;
 
             while (true)
             {
-                if (!listeners.Contains(port))
+                if (!listeners.Contains(port) && TryBindPort(port, localAddresses))
                 {
                     return port;
                 }
 
                 port += 2;
             }
         }
+
+        private static HashSet<IPAddress> GetLocalAddresses()
+        {
+            var addresses = new HashSet<IPAddress>
+            {
+                IPAddress.Any,
+                IPAddress.IPv6Any,
+                IPAddress.Loopback,
+                IPAddress.IPv6Loopback
+            };
+
+            try
+            {
+                var networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();
+
+                foreach (var networkInterface in networkInterfaces)
+                {
+                    if (networkInterface.OperationalStatus != OperationalStatus.Up)
+                    {
+                        continue;
+                    }
+
+                    var ipProperties = networkInterface.GetIPProperties();
+
+                    foreach (var unicastAddress in ipProperties.UnicastAddresses)
+                    {
+                        addresses.Add(unicastAddress.Address);
+                    }
+                }
+            }
+            catch
+            {
+                // ignored
+            }
+
+            return addresses;
+        }
+
+        private static bool TryBindPort(int port, HashSet<IPAddress> addresses)
+        {
+            TcpListener listener = null;
+
+            foreach (var address in addresses)
+            {
+                try
+                {
+                    listener = new TcpListener(address, port);
+                    listener.Start();
+                }
+                catch
+                {
+                    return false;
+                }
+                finally
+                {
+                    listener?.Stop();
+                }
+            }
+
+            return true;
+        }
     }
 }