GDAX WebSockets connection

GDAXWebSocketsConnection.cs

using System.Net.WebSockets;
var wsc = new ClientWebSocket();
await wsc.ConnectAsync(new Uri("wss://ws-feed.gdax.com"), CancellationToken.None);
Console.WriteLine("Connected...");
var msg = @"{""type"": ""subscribe"", ""product_ids"": [""BTC-USD"", ""ETH-USD"", ""ETH-BTC""]}";
Console.WriteLine(msg);
await wsc.SendAsync(new ArraySegment<byte>(Encoding.UTF8.GetBytes(msg)), WebSocketMessageType.Text, true, CancellationToken.None);
var buffer = new ArraySegment<byte>(new byte[4096]);
while (true)
{
    WebSocketReceiveResult result = await wsc.ReceiveAsync(buffer, CancellationToken.None);
    if (result.CloseStatus.HasValue)
    {
        Console.WriteLine("Closed connection...");
        break;
    }
    var str = Encoding.UTF8.GetString(buffer.Array, 0, result.Count);
    Console.WriteLine(str);
}