vtortola.WebSockets.WebSocketHandshake.GenerateHandshake C# (CSharp) Method

        public String GenerateHandshake()
        {
            SHA1 sha1 = SHA1.Create();
            return Convert.ToBase64String(sha1.ComputeHash(Encoding.UTF8.GetBytes(Request.Headers[WebSocketHeaders.Key] + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11")));
        }
    }

        private void SendNegotiationResponse(WebSocketHandshake handshake, StreamWriter writer)
        {
            writer.Write("HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\n");
            if (handshake.Response.Cookies.Count > 0)
            {
                foreach (var cookie in handshake.Response.Cookies)
                {
                    writer.Write("Set-Cookie: ");
                    writer.Write(cookie.ToString());
                    writer.Write("\r\n");
                }
            }
            writer.Write("Sec-WebSocket-Accept: ");
            writer.Write(handshake.GenerateHandshake());

            if (handshake.Request.Headers.HeaderNames.Contains(WebSocketHeaders.Protocol))
            {
                writer.Write("\r\nSec-WebSocket-Protocol: ");
                writer.Write(handshake.Response.WebSocketProtocol);
            }

            WriteHandshakeCookies(handshake, writer);

            writer.Write("\r\n\r\n");
        }