fix mono build

MediaBrowser.Mono.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2013
-VisualStudioVersion = 12.0.30723.0
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MediaBrowser.Model", "MediaBrowser.Model\MediaBrowser.Model.csproj", "{7EEEB4BB-F3E8-48FC-B4C5-70F0FFF8329B}"
 EndProject
@@ -35,6 +35,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MediaBrowser.Server.Startup
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Emby.Drawing", "Emby.Drawing\Emby.Drawing.csproj", "{08FFF49B-F175-4807-A2B5-73B0EBD9F716}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mono.Nat", "Mono.Nat\Mono.Nat.csproj", "{D7453B88-2266-4805-B39B-2B5A2A33E1BA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -203,6 +205,18 @@ Global
 		{08FFF49B-F175-4807-A2B5-73B0EBD9F716}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{08FFF49B-F175-4807-A2B5-73B0EBD9F716}.Release|Any CPU.Build.0 = Release|Any CPU
 		{08FFF49B-F175-4807-A2B5-73B0EBD9F716}.Release|x86.ActiveCfg = Release|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Debug|x86.Build.0 = Debug|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Release Mono|Any CPU.ActiveCfg = Release|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Release Mono|Any CPU.Build.0 = Release|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Release Mono|x86.ActiveCfg = Release|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Release Mono|x86.Build.0 = Release|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Release|x86.ActiveCfg = Release|Any CPU
+		{D7453B88-2266-4805-B39B-2B5A2A33E1BA}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

MediaBrowser.Server.Startup.Common/ApplicationHost.cs

@@ -1177,20 +1177,24 @@ namespace MediaBrowser.Server.Startup.Common
 
         public async Task<List<IPAddress>> GetLocalIpAddresses()
         {
-            var localAddresses = NetworkManager.GetLocalIpAddresses()
-                .Where(IsIpAddressValid)
-                .ToList();
+            var addresses = NetworkManager.GetLocalIpAddresses().ToList();
+            var list = new List<IPAddress>();
 
-            return localAddresses;
+            foreach (var address in addresses)
+            {
+                var valid = await IsIpAddressValidAsync(address).ConfigureAwait(false);
+                if (valid)
+                {
+                    list.Add(address);
+                }
+            }
+
+            return list;
         }
 
         private readonly ConcurrentDictionary<string, bool> _validAddressResults = new ConcurrentDictionary<string, bool>(StringComparer.OrdinalIgnoreCase);
         private DateTime _lastAddressCacheClear;
-        private bool IsIpAddressValid(IPAddress address)
-        {
-            return IsIpAddressValidInternal(address).Result;
-        }
-        private async Task<bool> IsIpAddressValidInternal(IPAddress address)
+        private async Task<bool> IsIpAddressValidAsync(IPAddress address)
         {
             if (IPAddress.IsLoopback(address))
             {