wss issue "The client and server cannot communicate, because they do not possess a common algorithm" about websocket4net HOT 1 OPEN

I think that the problem is related to the code found in the PR #123.
In the WebSocket4Net/WebSocket.NoSilverlight.cs file there is the following line:
private SslProtocols m_SecureProtocols = SslProtocols.Default;
I think it should be
private SslProtocols m_SecureProtocols = SslProtocols.None;

If we look at SslProtocols Enum we see

for Default:

Use None instead of Default. Default permits only the Secure Sockets Layer (SSL) 3.0 or Transport Layer Security (TLS) 1.0 protocols to be negotiated, and those options are now considered obsolete. Consequently, Default is not allowed in many organizations. Despite the name of this field, SslStream does not use it as a default except under special circumstances.

for None:

Allows the operating system to choose the best protocol to use, and to block protocols that are not secure. Unless your app has a specific reason not to, you should use this field.

from websocket4net.