Mono Upgrade DnsEndPoint problem with .net 4.6

Code (CSharp):

1. hostEndPoint = new DnsEndPoint("localhost", port, AddressFamily.InterNetwork);
2. clientSocket = new Socket(hostEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
3. SocketAsyncEventArgs connectArgs = new SocketAsyncEventArgs
4. {
5.     UserToken = clientSocket,
6.     RemoteEndPoint = hostEndPoint
7. };
8. connectArgs.Completed += OnConnect;
9. clientSocket.ConnectAsync(connectArgs);
10.  

When using the code above in normal .net project. It can run successfully. But with Unity .net 4.0 project, it reports "AddressFamilyNotSupported".

I tried to use it without specify AddressFamily, both not working with normal .net project and unity .net 4.0 project.

 

Yes. I tried it with latest 2018.1 beta.

 

Just submitted an issue. Use it to connect any server and reproduce. I'm testing with Unity 2018.1b10 on win 10.

 

Here's the issue. case 1012875