public async Task SendAsync(byte[] data, WebsockOpCode opcode = WebsockOpCode.Text)
{
WebsockFrame frame = new WebsockFrame();
frame.Fin = true;
frame.Data = data;
frame.Masked = true;
frame.Opcode = opcode;
byte[] frameData = frame.Dump();
await stream.WriteAsync(frameData, frameData.Length);
}
