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EnableLiveUpdate on UWP

See original GitHub issue

Repro:

Check out https://github.com/nosami/Elmish.Calculator and add a UWP app to it. (VS: right click on solution, Add Project | C# | Cross-platform | Xamarin.Forms, blank app.) In the UWP app, add a reference to Elmish.Calculator and set EntryPoint in package.appxmanifest to Elmish.Calculator.App, and set MainPage.xaml.cs to LoadApplication(new Elmish.Calculator.App()).

Run or debug the UWP app.

Expected: shows calculator app, runs fine Actual: shows calculator app for about ten seconds, then throws a SocketException and terminates.

System.Net.Sockets.SocketException
  HResult=0x80004005
  Message=Only one usage of each socket address (protocol/network address/port) is normally permitted
  Source=System.Net.Sockets
  StackTrace:
   at System.Net.Sockets.Socket.UpdateStatusAfterSocketErrorAndThrowException(SocketError error, String callerName)
   at System.Net.Sockets.Socket.DoBind(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Bind(EndPoint localEP)
   at System.Net.Sockets.UdpClient..ctor(Int32 port, AddressFamily family)
   at <StartupCode$Elmish-XamarinForms-LiveUpdate>.$LiveUpdate.Start@45-2.Invoke(Unit unitVar)
   at Microsoft.FSharp.Control.AsyncPrimitives.CallThenInvoke[T,TResult](AsyncActivation`1 ctxt, TResult result1, FSharpFunc`2 part2)
   at <StartupCode$Elmish-XamarinForms-LiveUpdate>.$LiveUpdate.Start@71-14.Invoke(AsyncActivation`1 ctxt)
   at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.FSharp.Control.AsyncPrimitives.Start@938-1.Invoke(ExceptionDispatchInfo edi)
   at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction)
   at Microsoft.FSharp.Control.TrampolineHolder.ExecuteWithTrampoline(FSharpFunc`2 firstAction)
   at <StartupCode$FSharp-Core>.$Async.Sleep@1355-1.Invoke(Object _arg3)
   at System.Threading.TimerQueueTimer.<>c.<.cctor>b__19_0(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.TimerQueueTimer.CallCallback()
   at System.Threading.TimerQueueTimer.Fire()
   at System.Threading.TimerQueue.FireNextTimers()
   at System.Threading.TimerQueue.AppDomainTimerCallback()

Additional info:

Commenting out do runner.EnableLiveUpdate () makes the SocketException go away.

System details:

Windows 10, Visual Studio 15.8.1.