fix net452 (#454)

src/WireMock.Net/Owin/HostUrlOptions.cs

@@ -1,43 +1,43 @@
-using System.Collections.Generic;
-using WireMock.Util;
-
-namespace WireMock.Owin
-{
-    internal class HostUrlOptions
-    {
-        public ICollection<string> Urls { get; set; }
-
-        public int? Port { get; set; }
-
-        public bool UseSSL { get; set; }
-
-        public ICollection<(string Url, int Port)> GetDetails()
-        {
-            var list = new List<(string Url, int Port)>();
-            if (Urls == null)
-            {
-                int port = Port ?? FindFreeTcpPort();
-                list.Add(($"{(UseSSL ? "https" : "http")}://localhost:{port}", port));
-            }
-            else
-            {
-                foreach (string url in Urls)
-                {
-                    PortUtils.TryExtract(url, out string protocol, out string host, out int port);
-                    list.Add((url, port));
-                }
-            }
-
-            return list;
-        }
-
-        private int FindFreeTcpPort()
-        {
-#if USE_ASPNETCORE || NETSTANDARD2_0 || NETSTANDARD2_1
-            return 0;
-#else
-            return PortUtils.FindFreeTcpPort();
-#endif
-        }
-    }
+using System.Collections.Generic;
+using WireMock.Util;
+
+namespace WireMock.Owin
+{
+    internal class HostUrlOptions
+    {
+        public ICollection<string> Urls { get; set; }
+
+        public int? Port { get; set; }
+
+        public bool UseSSL { get; set; }
+
+        public ICollection<(string Url, int Port)> GetDetails()
+        {
+            var list = new List<(string Url, int Port)>();
+            if (Urls == null)
+            {
+                int port = Port > 0 ? Port.Value : FindFreeTcpPort();
+                list.Add(($"{(UseSSL ? "https" : "http")}://localhost:{port}", port));
+            }
+            else
+            {
+                foreach (string url in Urls)
+                {
+                    PortUtils.TryExtract(url, out string protocol, out string host, out int port);
+                    list.Add((url, port));
+                }
+            }
+
+            return list;
+        }
+
+        private int FindFreeTcpPort()
+        {
+#if USE_ASPNETCORE || NETSTANDARD2_0 || NETSTANDARD2_1
+            return 0;
+#else
+            return PortUtils.FindFreeTcpPort();
+#endif
+        }
+    }
 }