Odd socket behaviour under Mono 3.2.8 on Debian - vb.net

Question

I'm writing a VB.Net app in VS2015 which connects to a socket and listens for data. It works perfectly on Windows but when I try to run it under Mono 3.2.8 I get an unusual behaviour.
Here is a simplified version of my code. This works on Windows:
Module Module1
Sub Main()
' Declare client socket and client stream to get data from the dongle etc
Dim clientSocket As New TcpClient()
Dim clientStream As NetworkStream
' Connect to socket
clientSocket.ExclusiveAddressUse = False
clientSocket.LingerState.LingerTime = 0
' Try to connect to socket
Try
clientSocket.Connect("127.0.0.1", 30003)
Catch ex As Exception
' write error
Console.WriteLine("Exception: " & ex.ToString())
End Try
' Tie server stream to socket
clientStream = clientSocket.GetStream()
End Sub
End Module
The error message thrown is:
Unhandled Exception:
System.InvalidOperationException: Bind has already been called for this socket
at System.Net.Sockets.Socket.set_ExclusiveAddressUse (Boolean value) [0x00000] in :0
at System.Net.Sockets.TcpClient.set_ExclusiveAddressUse (Boolean value) [0x00000] in :0
at ConsoleApplication1.Module1.Main () [0x00000] in :0
[ERROR] FATAL UNHANDLED EXCEPTION: System.InvalidOperationException: Bind has already been called for this socket
at System.Net.Sockets.Socket.set_ExclusiveAddressUse (Boolean value) [0x00000] in :0
at System.Net.Sockets.TcpClient.set_ExclusiveAddressUse (Boolean value) [0x00000] in :0
at ConsoleApplication1.Module1.Main () [0x00000] in :0
As I'm setting clientSocket.ExclusiveAddressUse = False before I specify the IP address and port I can't see why it's failing.
Looking around on the web I can see mentions of this as a bug back in 2010 but nothing more recent. I've searched the release notes of all releases after 3.2.8 but there is no mention so it looks like this is still a bug ?
If it is, is there a work around ?