public async void Connect()
        {
            var settings = CFNetwork.GetSystemProxySettings();

            string host = settings.HTTPProxy;
            int port = settings.HTTPPort;

            var ws = new ClientWebSocket();
            ws.Options.Proxy = new WebProxy(host, port);

            //  Non SSL
            //await ws.ConnectAsync(new Uri("ws://echo.websocket.org"), CancellationToken.None);

            //  SSL
            await ws.ConnectAsync(new Uri("wss://echo.websocket.org"), CancellationToken.None);

            var messageBytes = Encoding.UTF8.GetBytes("Hello world!");

            var sendArraySegment = new ArraySegment<byte>(messageBytes);

            await ws.SendAsync(sendArraySegment, WebSocketMessageType.Text, true, CancellationToken.None);

            var receiveBuffer = new byte[1024];
            var receiveArraySegment = new ArraySegment<byte>(receiveBuffer);

            var result = await ws.ReceiveAsync(receiveArraySegment, CancellationToken.None);

            var receiveMessage = Encoding.UTF8.GetString(receiveBuffer, 0, result.Count);
            Debug.Write(receiveMessage);
        }

Visual Studio Enterprise 2017 for Mac
Version 7.7.4 (build 1)
Installation UUID: 1ede8c5d-9d75-419f-82a5-a4e553d2c07f
	GTK+ 2.24.23 (Raleigh theme)
	Xamarin.Mac 4.4.1.178 (master / eeaeb7e6)

	Package version: 516000221

Mono Framework MDK
Runtime:
	Mono 5.16.0.221 (2018-06/b63e5378e38) (64-bit)
	Package version: 516000221

NuGet
Version: 4.8.0.5385

.NET Core
Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
	2.1.6
	2.1.2
	2.1.1
	2.0.5
	2.0.0
	1.1.2
	1.0.5
SDK: /usr/local/share/dotnet/sdk/2.1.500/Sdks
SDK Versions:
	2.1.500
	2.1.302
	2.1.301
	2.1.4
	2.0.0
	1.0.4
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/5.16.0/lib/mono/msbuild/15.0/bin/Sdks

Xamarin.Profiler
Version: 1.6.4
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

Updater
Version: 11

Xamarin.Android
Version: 9.1.5.1 (Visual Studio Enterprise)
Android SDK: /Users/cosminstirbu/Documents/sdk
	Supported Android versions:
		4.4 (API level 19)
		5.1 (API level 22)
		6.0 (API level 23)
		7.0 (API level 24)
		7.1 (API level 25)
		8.0 (API level 26)
		8.1 (API level 27)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 28.0.0
SDK Build Tools Version: 28.0.3

Microsoft Mobile OpenJDK
Java SDK: /Users/cosminstirbu/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_1.8.0.9
openjdk version "1.8.0-9"
OpenJDK Runtime Environment (build 1.8.0-9-microsoft-b00)
OpenJDK 64-Bit Server VM (build 25.71-b00, mixed mode)

Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

Android Device Manager
Version: 7.7.5.0
Hash: 06ceaea1

Apple Developer Tools
Xcode 10.1 (14460.46)
Build 10B61

Xamarin.Mac
Version: 5.2.1.13 (Visual Studio Enterprise)
Hash: a4332c90
Branch: 
Build date: 2019-01-11 13:08:10-0500

Xamarin.iOS
Version: 12.2.1.13 (Visual Studio Enterprise)
Hash: a4332c90
Branch: d15-9
Build date: 2019-01-11 13:08:09-0500

Xamarin Inspector
Version: 1.4.3
Hash: db27525
Branch: 1.4-release
Build date: Mon, 09 Jul 2018 21:20:18 GMT
Client compatibility: 1

Build Information
Release ID: 707040001
Git revision: 2a4679454f31c8bb887cfd181ea133c9149d3cad
Build date: 2019-01-30 16:18:21+00
Build branch: release-7.7.4
Xamarin extensions: c8b4305fd4c60b9c25947072eb150fdc3a5aa2b5

Operating System
Mac OS X 10.14.0
Darwin 18.0.0 Darwin Kernel Version 18.0.0
    Wed Aug 22 20:13:40 PDT 2018
    root:xnu-4903.201.2~1/RELEASE_X86_64 x86_64

Enabled user installed extensions
AddinMaker 1.4.3
FileNesting 0.1.1
Macaque Tips 0.1.2
StyleCop Support 1.1.0.0
xUnit.NET 2 testing framework support 0.7.5
Redth's Addins 1.0.9
Straight8's SpecFlow Integration 1.11.2.0
Internet of Things (IoT) development (Preview) 7.5.3