Connection header error in NET 4.8

[codingyourlife]

Seems to work fine in .net CORE but not in .net 4.8

I receive this error on Connect()

WebSocketException: The 'Connection' header value 'Upgrade,Keep-Alive' is invalid.

[codingyourlife]

I've switched to WebSocket4Net-standard which is also better documented. You can close if you want.