aspnetcore/samples/TestClient/Program.cs

using System;
using System.Net.WebSockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.WebSockets.Client;

namespace TestClient
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("Waiting to start");
                Console.ReadKey();
                RunTestAsync().Wait();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }

        private static async Task RunTestAsync()
        {
            WebSocketClient client = new WebSocketClient();
            WebSocket socket = await client.ConnectAsync(new Uri("ws://localhost:12345/"), CancellationToken.None);
            byte[] data = new byte[100]; // Encoding.UTF8.GetBytes(
                // TODO: Hangs after 10 seconds 
                // "Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World"
                // "Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, "
                // "Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, "
                // "Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, Hello World, "
                // );
            while (true)
            {
                // await socket.SendAsync(new ArraySegment<byte>(data), WebSocketMessageType.Text, true, CancellationToken.None);
                WebSocketReceiveResult result;
                do
                {
                    result = await socket.ReceiveAsync(new ArraySegment<byte>(data), CancellationToken.None);
                    Console.WriteLine("Received: " + result.MessageType + ", " + result.Count + ", " + result.EndOfMessage);
                } while (!result.EndOfMessage);
                Console.WriteLine(Encoding.UTF8.GetString(data, 0, result.Count));
            }
            // await socket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing", CancellationToken.None);
        }
    }
}