Developing Secure WebSocket Server Using C #

Question

I am new to C # programming and have managed to develop an insecure C # web server server. The server works as expected when clients connect to the server from a browser and C # client application using ws://serverhostname:portnumber.

Now we need to move the production server to protect the websocket server. I tried to look for help on many sites, but still do not really understand how to maintain a secure connection on the network.

After much research on the Internet, I found that we are creating a secure websocket server below on the server.

• Create a signed certificate on the server to be used in AuthenticateAsServer.
• Use the class SslStreamto create a secure stream.

But things that are still not clear to me.

• Do we need to use only an object SslStreamto send and receive data on a secure web server, or do we need to use SslStreamonly to establish a connection, and then use a socket object (for example, my insecure server) to send and receive data to a website.
• Do we need to perform a websocket handshake between the client and the server, that is, to upgrade from http to websocket.
• How do we encrypt or decrypt data on SslStream.

Could you help me with the source code or links for linking to the source code, since I tried my best to get the information, but could not find it at the moment.