TcpClient fail

Client.cs

private TcpClient client = new TcpClient();

public async Task<string> ConnectSendReceive(string message, int port)
{
  Connect(port);
  await Write(message);
  return await Read();
}

private void Connect(int port)
{
  client.Connect(new IPEndPoint(IPAddress.Loopback, port));
}

private async Task<string> Read()
{
  using (var stream = client.GetStream())
  {
      byte[] receiveBuffer = new byte[2048];
      int length = await stream.ReadAsync(receiveBuffer, 0, receiveBuffer.Length);
      return Encoding.Default.GetString(receiveBuffer, 0, length);
  }
}

private async Task Write(string message)
{
  using (var stream = client.GetStream())
  {
      byte[] byteMessage = Encoding.Default.GetBytes(message);
      await stream.WriteAsync(byteMessage, 0, byteMessage.Length);      
  }
}