class Program
    {
        static async Task Main()
        {
            Console.WindowWidth = 132;
            try
            {
                await ConnectClientAsync();
            }
            catch (Exception e)
            {
                Console.WriteLine($"Caught exception {e.GetType()}.{Environment.NewLine}{e.Message}.");
            }
            Console.WriteLine("Press any key to end.");
            Console.ReadKey();
        }

        private static async Task ConnectClientAsync()
        {
            TcpClient tcpClient = new TcpClient();
            await tcpClient.ConnectAsync(IPAddress.Loopback, 54321).ConfigureAwait(false);
        }
    }